No assistance!

Firstly a 5G router was delivered with no 5G simcard but the whole nimo simcard holder was in the box plus a 4G simcard, the complaint was attended to and the replacement simcard was delivered i am happy. I received the simcard on Monday the 28/03/2022. I am now struggling with Internet connection ever since the simcard was successfully activated yet even when you check online it says the device is correctly offline i have sent request since Monday to be assisted up to this day i have not received a call from anyone at rain to advise how they can help me or what i should. What is the use of having one of their product and i cannot use it.