Entering gift-aided membership in SA return

Hi I was wondering whether I am able to add a gift-aided membership to a registered charity as part of my SA return. They have given me gift aid declaration receipt saying that my payment to them of £49 has been treated as a donation and that this amount has been gift aided. However, they area also saying that the donation means may payment is treated as an annual membership with them. I am confused whether I can claim back for this, as some guidance suggests I'm not able to this if I'm receiving goods/services in return, such as entry to an event, or membership to something.

Hi

If you pay income tax at the higher or additional rates, you can claim further relief on top of the 20% already given.  
If your highest rate of tax is basic rate, no further relief is due.

Thank you