Rain worst customer service ever

If I could give no stars to rain then I definitely would. I received delivery of a rain 5G router and SIM on 02/11/2021 and I haven't been able to use it since. I have requested that they cancel my account with them and collect their router but to no avail. I explained to their consultants that I need wifi as I work from home therefore the should please cancel their service ASAP as I cannot sign up with another ISP whilst my home address is still registered with rain but all I get are automated emails saying that someone will be in touch within 24 hours which I'm still waiting for. No one from rain ever tried calling me, I am the one calling them each time. I've literally taken the router next to their supposed network tower and still couldn't connect. I just want rain to fetch their router and refund my money because I've never in my life experienced such poor service.