Bad service

On the 1st May I paid my R248.00 upfront for my ONT router to be installed at my house. Then I received a call on 5th May to confirm the installation which was done on that same day. But the router was faulty on the day of installation and it was left like that, till I logged a call on the on the 6th May reference no: ZF000ALUL Till today the 8th May I'm still waiting for a "technician". I tried to their WhatsApp self-service but it was not helpful.