Very bad service from Rain

I apply on Sunday for 5G at Rain, Tuesday I received my router (I think thats good service) when I turn it on it was working for 2 hours No signal. Wednesday still off after loadshetting its on again for about 2-3 hours, again it shows no signal. I did moved it around. Thursday I cancelled it, the operator said he send it to cancellation department that I can received my refund. Monday I call to found out when I will received my refund. The hold on for 18minutes before someone helps me. This man told me that it's not cancelled I have to cancelled online, He said that I have signal, but they got problems at the tower. I wend online and cancelled it myself. I'm still waiting for my refund, and I hope that they not deduct the payment this month. I send emails, and I call to get answer but they don't answer. Please help me.