No support from Rain

I upgraded from the 4g to 5g, before upgrading, I asked if I would bcoverage and I was told, that I would have coverage. I received my free to use router with my sim on the 27th October. From that time I have had no luck with coverage and have been without internet I called support everyday and and all they could submit a ticket and was assured someone would contact me. There was some help to a extend but nothing that could solve my problem. Basically I could not connect and I was misinformed about the coverage. The last consultant I spoke too, apparently was a Team Leader, and he said he will cancel the 5g and I have to return the router, but I have to pay upfront for the 4g Sim again. My question was, how is that possible, because it was not my fault, it was Rains fault for not double checking my coverage. So why, should pay upfront again, not even willing to compensate me, especially if it was there fault. He then advised me, he would call back the next day, which never happened, needless to say he did not call back. Not once did any member of support call me back, I had to phone every single day, with no solution. My issue has still not been resolved. I still have the 5g router, no internet and no communication with Rain