So will the free 30 day Playstation Plus auto renew on us if we don't cancel it?

I think when I got the free 30 days of Playstation Plus as part of the welcome back package that a message said it would not auto-renew but I can't remember for sure.

I got an email confirming that I have signed up for the free 30 days and the email said as follows which suggests after 30 days, it will renew (and charge me by adding funds to my wallet if necessary) - anyone know what the deal is:

The subscription you have purchased will continue until cancelled. Your wallet will be charged the above purchase price* automatically on the next renewal date stated above and subsequent renewal dates unless you cancel the subscription. Upon cancellation, you will not receive any refunds or credits, but the purchasing account will be able to enjoy the content for which you have paid. Please refer to the PlayStation(R)Network Terms of Service and User Agreement for details.

You can cancel the subscription by changing your account settings in the Transaction Management section of Account Management or contacting Customer Service. Also, if your wallet does not have enough funds and the "Automatic Funding" feature* is disabled on a renewal date, the subscription will be cancelled.

Please see the sections below for details on cancelling a subscription and the Automatic Funding feature.

[Cancelling a subscription]

- Cancelling from a PS3(TM) system or a PSP(TM) system:
Sign in to PlayStation(R)Network, and then go to [PlayStation(R)Network] > [Account Management] > [Transaction Management] > [Services List]. After selecting the subscription you want to cancel, select [Cancel Automatic Renewal].

- Cancelling from a PC:
Click on the following link, sign in to PlayStation(R)Network, and then go to [View Services]. After selecting the subscription you want to cancel, cancel the automatic subscription renewal.
https://store.playstation.com/login.gvm

[Automatic Funding]
* "Automatic Funding" is a feature to fund your wallet if your wallet does not have enough funds at the time of renewal. Your credit card is charged automatically the greater of the purchase cost or the minimum charge amount of US$5.00 for PlayStation® Network accounts in United States or CAD$5.00 for PlayStation®Network accounts in Canada. This feature will allow you to continue to receive subscriptions without worrying about the amount of funds in your wallet. This feature is not available for sub account holders and not available in some countries or regions.

The Automatic Funding feature will be turned "ON" automatically every time you purchase a subscription. You can change this setting at any time in the way described below. However, subsequent purchase of any subscription will automatically return the feature setting back to "ON."

- Setting "Automatic Funding" from a PS3(TM) system or a PSP(TM) system:
Sign in to PlayStation(R)Network, and then go to [PlayStation(R)Network] > [Account Management] > [Transaction Management] > [Automatic Funding].
- Setting from a PC:
Click on the following link, sign in to PlayStation(R)Network, and then select [Manage Wallet Options].
https://store.playstation.com/login.gvm

should i bother if i didnt put my credit card details in?

When I signed up for the free month it said it will NOT automatically renew after the month is up.