Terrible service!!!

MTN commit *****... i loaded airtime and received 120 mtn to mtn minutes along with data. So i checked my balance and saw that there was still intact 120 mins so i called my girlfriend on the other mtn sim that i purchased. Whilst stil on the call, the call dropped so i dialed back and it said i have insufficient airtime so i checked my balance as i had about R140 airtime and 120 mins but only spoke for an hour!!! only to find out that the minutes remained and my airtime was used up!!! so i tried using the minutes again and it wouldn't allow me to and states i have insufficient funds!!!! another instance was when my data connection was interrupted.. whilst surfing the internet my connection dropped so i dialed *136# only to find my balance stating 700mb and it only resumed when i purchased another bundle... so i decided to go online and use the ***** claim form only ro realise it does not work. So i emailed them got an automated response stating that my query will be reviewed and i will receive feedback within 3 working days which i never received!!!! The worst part of this is that im new to Mtn being a cellc client fir over 13 years and decided to give Mtn a try only to have issues during the firsr week and that Mtn doesnt take ***** seriously!!!!