I've read the links now. Cancellation seems pretty straightforward according to their terms and conditions. Do it now.
This is taken from their Ts and Cs:
Q) How long does my membership last?
A) Membership with Rewards First lasts from the time you enrol until the time you inform us that you wish to cancel. There is no minimum term.
7. How do I cancel my membership?
If you would like to cancel your membership, log onto the website and go to "My Account". You can then click where instructed, to discontinue your membership. Please note that this will mean you will no longer have access to any of the discounts which have previously been available to you.
You can also contact a Customer Service Advisor.
Email:
[email protected]
Phone: 0845 026 1091
Fax: 0870 143 2344
The contact centre is open Monday to Friday between 9am and 5pm. If you call out of hours please leave a voice mail with you details and we will call you back the next working day.
8. Why does it take 24 hours to cancel my membership?
All cancellations are batch processed within our current service standard of 24hours by a department separate from our customer services advisors. This service standard accounts for time differences associated with batch processing.