Mtn SA is a master of bad service

i bought a home network router and it was delivered on Monday. up to now ,i dont have internet connection. They have been sending me piller to post. others say the sim card has an error and i must do simwap with my money. others say i must wait another 48 hours. They even sent me to a store ,which was my total waste of time and money. I am now stuck with a device that wont work for me,but cost me more. i have to buy data,and tbey will still debit their money at the endbof the month. i would rate Mtn SA zero if i could