Faulty router needs replacement brought up issue multiple times

For the past few months since I started Fibre internet of vuma service I have been having issues with a faulty router, I have brought this issue up numerous times with the isps I dealt with, first I was webafrica and numerous times I told them something is wrong with the router as it keeps on switching of and disconnectinv my devices, I tried all trouble shoot methods recommended by them and not works, I live in family flat it's not a big space so I should not be experiencing disconnection of my devices c OK constantly every excuse in the book has been thrown my way for them not replace the router I have brought this issue up with the router many times, I know it takes two weeks to build up stability but it's almost more then a year now and this problem keeps on happening, I don't understand why a free to use router under warranty be replaced, the router constantly heats up, the reception in my own home of small space is dropping bars and is poor, I could not get help from webafrica and switched to mweb, This was based on they customer service reputation, recently this is the second time with mweb I brought up this issue, and now the second time I've did all they required test uploaded the results on the website and I'm not someone that's unfair I ran each test three times, on my end the is no more troubleshooting I can do, the router is clear faulty and cannot handle the speed that passing through I have many routers before for home use and this router is constantly hot from the time we got it from vuma, it switches of when it reaches its limit propbably a fail safe, now this is not Normal I'll go back to what I was saying I have had many routers and never experienced this, it's the to the point the router cant be touched for more then few seconds, mweb keeps on ignoring my complaint as my isp they supposed to be the middle man but no nothing, all I ask if for someone to come check it up as I am withing my rights and replace that router with something that can handle the workload, we are a completely digital household so yes I expect not be going through this, another thing that's happening I am paying for a 100mbps line and I and I am not getting any speed close to it yes I know it will never 100 percent but I expect speed ranging from 70mbsp and above unfortunately I'm on reach in my area it's the only access and that's the fastest speed I can pay for, I feel disrespected unsatisfied and the service now is unjust, do you as vuma make your duty not to replace free routers that are faulty, I am not asking for the world, I have reported this issue with isps many times you can pick that up on my line if you think I am lieing I just want what I pay for I don't mind to pay if recieve proper service, you guys seriously need to replace that router it's becoming a problem, I can't be having my router disconnect me constantly and he switch of constantly, everytime you guys say my signal is active, but you will always pick that the line is active on your end, that proves nothing, unless suspended the line will always show that it's on your side but my router having issues is not something you can see, I have been begging you guys to come and replace this for months, why is so hard, the equipment is faulty process of elimination shows that it cannot handle a fully digital workload and you guys advertise that there will be no issues going digital with your network, please I am asking you to do the right thing and value me as a customer and not just another number I have belief in your product, I expect service from you guys, what more must I do to get the faulty router replace and recieve help