Worst costumer service ever

Shame MTN‼️Far the worst costumer support ever‼️‼️Facts: having a self phone contract for 360 rand, applying for internet home on Tuesday, contract of 300- declined (n of course nobody informed me about it as they promised!) because my credit limit with them is 600 apparently -according to their IT supporter or something like that. I m applying for 200 contract on Saturday n after 2 hours in th branch, I m leaving the shop with th router which actually doesn't look to work but the employee said it will be activated completely the next 24 hours! Now, Monday the router is not working so I don't have Internet, plus I received this message "Yello, this is a reminder that you have exceeded your Credit Limit of R 814.00 Your services have now been suspended for outgoing calls. Kind Regards, MTNSA" so my calls are also blocked n for all of this situation I will have to pay at the end of the month 580 Rand ‼️just because MTN is that amazing n somehow they have the right to block my number, their router to not work n their calculations to not make any sense at all... plus, I m a foreigner so they have also the right to ignore in their branch n hung on the call pretending that they can't hear me because they don't want to deal with me!!!