Product Change Strangeness - Resolved

[#1]

I requested a change from Anytime+ to E+W which should have taken place on my next billing date (21/5/09) as per these *two* service notices on my account - SN68771969  and SN68776098.  However, my account is showing Talk E+W as active now (although I should still have to the 21st available on Anytime+) and payment has been taken for my calls on Anytime+.  My credit limit has also been reset to £55 for the remainder of the month.
My only concern is that I will be billed for daytime calls made between now and my billing date when I've paid in advance for Anytime+ up to that date. 
Could someone please take a look at my account and tell tell me whether this is the case or not?

Edit - Resolved by PM.  Daytime calls will be refunded once billing date passed.

[#2]

An update on this:
Billing have refunded the amount of overpaid subscription for Anytime+.  
No need to work out how many daytime calls would need refunding now 
Problem solved