Frustrated loyal customer

I wont reccoment cell c i have been paying for a device that has been booked in with them since 5/09/2020 i have imsurance on the device paid 300 acces fees been on the fone almost everyday with the repair centre het put on a call waiting for more then an hour today just to get the call has been cut of foned them again a half an hour ago all the tell me is we still waiting for a part really now my debit order does not ask me to go of att the 28 of each month it goes of i am paying for something that i cant use because of they bad service and customer care they consultant has an attitude i have ask to speak to a manager who is never available bad bad bad i am frustrated with cell dont think i will upgrade with them have been a loyal customer for years never missed a paymnet on them and this is the treatment i get