MWEB are *******!!!!!

I switched to MWEB LTE on August 25 2020. About a week ago any device further than 1 meter away from the router has no signal/internet. Anything connected with a lan cable or within a meter works perfectly fine. I have contacted MWEB 4 times (average call time 45min-60min) and was told by Zuhayer that it is my device and my problem. This device is not older than 6 months and according to the consumer protection act if anything is faulty I am entitled to a full refund or a brand new unit. This Zuhayer also informed me that if they send a new router and there is nothing wrong with the old one, I will be billed for the new unit. This is understandable, but MWEB is not willing to help me test the unit. So I (who does not know anything about routers) must now guess what the problem is and if I am wrong I will be billed? I have asked MWEB to send me an email with steps to test the router so that I can go through the steps 1 by 1 to test the router and they are not willing to do that. They also have no technicians that they will send out. The last call made 16/02/2021 I spoke to a very friendly Chad who tried his best to help me. After 40min later and no success he informs me he can not help me but he will put me through to another department. After holding for that department again, I was told they can not help me and I must speak to technical support (who I just spoke to for 40min and advised me to speak to the next department). I am completely fed up and have no idea what to do about this!!!