Sim only contract problems.

MTN does not care about their customers, what they good at is debiting client account without giving client service, in July 2021 I took a Sim only contract with MTN I received the Sim card beginning of August, I called for activation, I was told activation was done and I should for at least 24 hours before I start using the Sim card which I did, after 24 hours when I tried using the Sim card I got an error message to say the Sim is not Rica registered, I did the Rica process, but still the Sim card did not work, I called the help desk I was taken from pillar to post, till today, sometimes when I try using the Sim card I get an message saying service execution error, they already debited my account twice so far, what frustrate me most is when I bought this Sim card it was for my daughter's online schooling, now am spending double as am paying MTN and also buy data, MTN is so cruel and useless, I can't pay for services that I did not receive, I will exhaust all avenues to get assistance, they cannot get away with this, they are too much.