Paid but Rain wont re-instate wifi, ensures we speak to agents we dont understand

We have had our intial 5G router almost a year, and a good relationship with Rain, we then added another router on the contract to another address, but decided to cancel it as the person using the wifi took out their own wifi with Rain. We asked Rain to cancel the 2nd newer router and we paid them for the 1st initial contract, but now they cancelled both routers and we lost 2days of WIFI we paid for last month and now with work and a thesis looming for monday, I have to hotspot. Rain keeps ensuring we speak to foreign call centre agents and we dont understand a word their saying and social media is utterly useless while the hotspot is costing me alot of money. How hard is it to put on the original router, it should not take 2 days. I am so so dissappointed and royally fumed at how useless Rain is.