Worse customer service and network coverage in the evening.

I have been using Rain since year 2024 on a different address , every evening from 6 pm I lose the connection, moved to my current address in June 2025 and I am still experiencing the same issue, I have went to their store in Rondebotch numerous times, At some point the router was changed, What is frustrating I work US hours at a time when I need my WIFI to work it does not, I have unplugged my router and have never used it even once this month and the number of calls I am getting to make a payment are shocking because I have never received the support I needed when I have been paying for a service that does not serve me as it should. The consultant in the store advised there is nothing they can do to improve the network coverage because at 6 pm most people are back at work, no customer service, expensive monthly payments and having to buy normal data so I can hotspot on my phone for work has been draining.