Faulty router nightmare

I was in the market looking for fibre, my area is covered by 2 service providers and one of them being telkom. I enquired online and got assistance on a 12month contract package that suit my needs, my order was processed quickly and technician came and installed the wires anf the router arrived the following day. I tried to setup the router but it connected to the network but 5min later it kicked the network off. And kept on saying failed connection. I contacted the technician and asked for help. He took me step by step and the router was set. It picked up the network then 5min later the same thing happened. He advised that i contact telkom. Where my nightmare started. On the 19th i logged a call and was given a reference number, i called on the 25th to follow-up on my enquiry to my shock i was yolf that the reference number was not linked to my profile. I started the process again. The lady helped me to setup the router and the same thing happened it reverted to red light with no internet. I logged the second call received another reference number. Today on the 28th i call to follow-up and the lady tell me there is nothing wrong with my router the network had a problem now i am shocked. I asked if she read the matter before she jumped to that conclusion and she rudely told me i am telling you what was the problem and the matter is resolved while i am looking at this red router light. I felt that i chose the wrong service provider as am setting with a non-functional router for 10 day and i cannot get the matter resolved