I phoned car tracker since last week for device transfer I was promised by a lady a that she did a booking for of which she did

I phoned car tracker since last week for device transfer I was promised by a lady a that she did a booking for of which she did. I phoned yesterday the guy I spoke to advised me the they will definitely come first thing in the morning at 8:00. No communication no nothing I waited till now delayed work, I had to call them they telling me that they won’t be coming at 8:00 but between 08:00 to 16:00. Bad service