I CAN NOT ACCESS MY SAGEONE ACCOUNT (FOR 3 MONTHS) AFTER PAYING IN FULL

I can not use SageOne as it states when logging in: "Your Accounting registration expired on 26/03/2019", when I have made FULL payment on the 25th of March 2019 (Ref: Sc ********** 41- ********** ). I have sent proof of payment, numerous follow up emails, tried to phone the support line numerous times but it takes hours before you get through, left messages in online support, BUT TILL TODAY I CAN NOT ACCESS MY BUSINESS SAGEONE ACCOUNT WHICH I FULLY PAID FOR.