Web Africa no service and do not keep their promise.

I apply for a fiber line in the beginning of October. On the 26the of October 2022 the promise it will be up and running in 7 days I on it on email. I've paid R249 for router. It is still seal in my cupboard. ("We get you up and running within 7 days (on average if your area is active) • SLA PROMISE: We'll get you up and running within 14 days or we will credit your account with R999! (T&Cs apply). They delivered and on the 31st of October 2022 they promise on email it will be installed in 5 working days. On the 8th of November 2022 they say it is on a pre order. So, they did not deliver or install anything and did not keep any promise. When I contact them, "there account department would contact me." Up to date nobody did. So, what can, or must I do?