Fixed 50Gb Cell C Migration **** from Afrihost

I received a mail form Afrihost stating they canceling my Cell C package end of Feb2020 but not to worry i they have a migration option for me "Free of charge" i followed the steps, when i got the the offices to collect, they give me the new sim but then tell me it would not work on my old router and i need to pay R999 in order to keep on using the service.. What type of money making scheme is this from them.. Total Ripoff. Canceling my service!