Supersonic

Placed order for fibre on 9th Dec and I haven't receive a single e-mail for confirmation from supersonic, I received a call to confirm address, then installation was scheduled for 22nd Dec which they confirmed with an e-mail stating that they will come to inspect the property to see if everything in order for installation which wasn't done, on the installation day they arrived and checked on the street box and slim box wasn't there so they said installation can't be done until they install slim box, those guys were from nano fibre subcontractors with Vuma, I had to take leave for installation and it was wasted, then I had to call supersonic to explain whole scenario and they said they will arrange LTE route for time being and will call me back, still waiting for the call, I called them again today and the agent doesn't have much knowledge, when I try their WhatsApp chat it keeps connecting with different person with no response. REALLY frustrating service.