Mtn Data Contract not working for months, yet MTN still take my money

Got a data contract in April 2017, everything was setup in store, but the next day noticed the 3G ****le doesn't connect, went to MTN store and told a problem with RICA, so they did it again, days later still not working, after months, multiple calls and trips to MTN stores one techician finally figured out that the sim has NEVER been activated. 4 weeks later still not working, phoned again only to be told I am supposed to phone a number that sms'ed to the NON WORKING sim ti activate it. I phone the number and it is just says this centre is closed. Been 10 months, MTN take my money every month, yet haven't once delivered on their end of the contract.