Rain sucks as a Telecoms company

Rain is poor in their communication skills as a company and *********** when it comes to solving their problems with clients. I have been over charged for the last 5 months. Double the agreed amount to be exact. They do not have walk in branch or even a call centre. One has to always go through the app and leave a message for them only to get an email of acknowledgement with a reference number. Only to be called 3 weeks later, and get promised to solve the issue. With no luck. I have been debited double the amount of the agreed contract ever since I converted to the 101 router. To make things worse I am now getting a 2G coverage and no longer a 5G. Hence I am in a good feeder zone. Rain socks and I want all the difference I have paid in the last 5 months.