POOR SERVICE

POOR SERVICE, i had insurance for S7 and upgraded to S10e and cancelled my insurance for S7 and took insurance for S10e. I was billed for two phounes and enquired with then why are they billing me for the cancelled insurance, i was credited for S7 and they have now cancelled both insurance instead of S7 one, i have enquired about it and i was asked to send proof of billing of which i did, instead of them reactivating my S10e insurance they are now telling me to pay the credited amount for S7 before they can reactivate the insurance for S10e which has nothing to do with the insurance for S7. Would also like to know why my insurance is cancelled because i haven't send request to do so.