No installation for my line 2

I made a payment on 18/12/2024 and I received an sms from vumatel/flycool that an installation will be done for me on 20/12/2024 of which the Brightlink people did come for an installation, however they said there is a problem with a second line therefore they cannot install. The person installing for me said he has to contact technicians to come and put a second line of which they were supposed to come same day or Saturday (21/12/2024) of which to this day they have not come and there is no communication, I am the one calling them and making a follow up. I am irate and frustrate with the service, I am currently working from home and have to use my data of which is extra cash which I don't have, please help me with a refund and cancellation of all this.