Our bid for more solar panels was left out in the cold

We paid a deposit for solar panels with Green Energy Together but all we've got is scaffolding

We had solar panels fitted in 2019 as part of the Solar Together initiative, and this year wanted to add to them. We chose Green Energy Together as it had done Solar Together projects with our council. We paid a 1,340 deposit. There was then a rather odd silence, but finally scaffolding and two installers appeared. The installers hadn't been told the panels had to be fitted in addition to those already there, so the kit they had brought was inappropriate. Since then, in spite of daily phone calls and promises from the company that someone would ring back, nothing has happened.

We eventually cancelled our order by phone and email, and asked for the return of our deposit and the removal of the scaffolding. Again, there has been silence, even from the company director we emailed directly. We are concerned that this company has over-reached itself while holding on to our money (and that of a lot of other people, if Trustpilot is to be believed). We are also concerned that the scaffolding is still on our house and is a security risk.