Poor service

I have a sim card contract with MTN that I had fully paid for to enjoy the data. Today is the 25th and I have not had access to my data, I have literally sent 12/15 emails regarding my issue and I would get different responses that "it will take 5-7 working days" "an incident ticket has been logged". What frustrates me the most is that soon they will debit money from my account for May yet I never got to utilise April's data.