MTN is Robbing me

Good day all I went to a MTN store about 4 months ago to upgrade my phone an desided to only take our a data sim that stayed 2gb day 2gb night data for R89-00 so i took out that deal just to find out they did it on a difrent customers name i phoned in at MTN reported the problem and then asked them to do the upgrade for 89_-00 the first month i paid 149 i phoned in and asked them to fix it they said it will be corrected in 7 days next month they took 149-00 again i called in 3 Times theu said again they will fox it next month the same again i went to the MTN store in Tamboti Mall in Randfontein they send a e-mail and now they took the same again so every month they are robbing me with R50-00 with the discount they did not load ....... Think twise before you choose MTN ............ Worst service ever seen before thank you MTN for nothing