Vodacom insurance incompetence

my account was debited double the amount, i called vodacom on 01/04/19 and was told to give a ref number and my issue would be escalated to the finance department and will be called back, days later no one calls and i call again, to be promised a cal back again after providing a bank statement as proof, 5 days later i still have not heard anything from them, now i\again i must be the one that follows up because they are not bothered. Next thing i know i will be told my insurance has lapsed because i reversed the double paymnt