Horrific service from MTN uncapped internet and being charged for something i dont have

I took a uncapped wifi contract with MTN, was charged a pro rate amount for 25th to end of month yet i still dont have the modem??? When i spoke to the consultant i told them to arrange delivery by friday the 28th July as i am away for a long weekend, drivers got there and couldnt pick my finger print up on the system so they could not give me the modem, now on Sunday i get a sms stating if i dont COLLECT the moden by end of the day they will send the modem back to head office tomorrow!!! There is no number to contact them to query this, what absolute horrific service received and still this is not sorted out? So i was charged for pro rata days which i did not have use of the modem and i still dont have the moden to start the month which i have also already been billed for. How do i get hold of a person to speak to at MTN???