mtn can't seem to get things right

I have spent almost 2 weeks and countless hours on the phone disputing an incorrect billing of R9130.05 which I got after I paid settlement fee for my contract ***. I paid exactly what I was quoted and within the time frame of quote validity. However instead of resolution I get an sms on the 22nd of October 2019 that they are reviewing a credit amount of R4185.05. Where did they get that from when the amount being disputed is R9130.05?

I thought it was common sense to read all the facts in a case before going to the next step. Had who ever sent me the text took time to fami****ize him or herself with the facts in the case, the sms I received would have been talking of an amount of R9130.05 and not the amount of R4185.05. MTN please can you do something right for the first time. It has been 2 weeks of hell for me so far but I am not a zombie and will not be donating money to MTN just like that.