From One escalation to another-series of escalations- No solutions!

DSTV Multichoice was not suppose to go for internet route. It is now two weeks sitting with the problem of no internet in their WIFI. It is from one escalation to another-No solution at all. Come month end; they are very quick to debit your bank account. However, they have absolutely no knowledge of the product they are selling. Isn't this ****ming us of our hard earned money? After having three reference numbers I got from *********** agents of Dstv; another one called me yesterday. I was thinking she will provide a solution! No, she also escalated to MTN! from one escalation to another. Now I have to wait for couple of days to get another useless escalation call. My question is how on earth do you sell these routers because you have zero knowledge of their failures?