I have been a member for 15 years and always paid my membership ,i changed cards and now 1 pay currant membership and not my usual £ 3.20 is this right ?
Usually, the grandfathered price shows up on the final payment page e.g.
8.99
3.20
Have you finalised the payment yet?
If so, does your bank account show the higher payment?
If you haven't finalised the payment yet, try doing it as you should be automatically charged the grandfathered rate.