Cell c - Service not on standard

I have problems with my LTE A router. It connects then stops for days... i phoned Cell c they said i must update my router to resolve the matter. How do you update a router with no internet connection? Then These people are there to help you? One day later i phoned again. And i explained again what is wrong then the guy told me i must do a sim swop... but the router does connect then stops.... so after 3 month i phoned again still got the same problem... now they are telling me they will look into it then phone me back, but when its time to pay, i must pay or els There will be problems. I im a loyal customer to cell c i have 3 contracts with them. Im almost paying R1500 a month to them. My LTE A router deal is 200G for R850 a month... in total of these 2 months going for my third month ive only used round about 30G of data because of the problems i got with this router. And the best part is they made me sign a document, that states that i do have LTE A in my area or the will not release the router to me. Now i donth have any connection.... so for so far ive paid R1700 for 30G of data... Thank you Cell c you keep your customers very happy or must i say your pocket. Maybe i should just move over to Telkom or vodacom. Atleast there you get what you pay for