Bad service and lots of run around

Use to think very highly of the web Africa team , until yesterday one of their stuff told another I’m lying????????♂️. I have adsl with web Africa, and for the past three months it’s been intermittent, I bought new routers twice the only thing that changed with the latest router is that the authentication fails in the middle of the night and the router cannot reconnect with my username and password. This did not happen with the first router it was just intermittent and recovered (sometimes goes off for hours), they sent telkom techs to my house 4 times thus far and nothing has changed, Sunday I spoke to one of their call center guys and explained my situation, he then did some tests and could confirm authentication fails, and would send me a router to test, I even told him of this third router works I’ll even buy it, then Monday layaan valentine , another consultant, who has been good to me informs me they will not send the router and the guy denies saying he would send one ( even though I received an email for a router request), how do you give bad service and accuse someone of lying? How do you charge me R744 but your service is bad? Telkom line cannot be the problem if 4 different times technical guys were sent to my house. To make it worse my support emails are now being ignored after being accused of lying.