Fibre being transferred to cell C - no connectivity

On the 20th of Feb I received a notification that my fibre ISP would be transferred to c fibre. I was weary of this, as I deliberately didn't sign up with 1 of the big telecom operates fearing the lack of support we've before accustomed to. We were assured however that this would be a seamless switch. It's now 2 full days with absolute no connectivity. I've spend hours on the phone to cell c support with not much clue as to how to assist, consistently being put on hold and assured of call backs, but to no avail. I've emailed cell c support and am also yet to receive a reply from them. If I'm not assisted urgently will look to move to ISP.