Very disappointing experience from Killowatt

fourteen months ago, after very informative discussions with the Kilowatt salesman we decided to remove our gas central heating system and replace it with an ERAD system with heaters controlled from a control panel. We also changed from a gas to an electric hob.
We were told that the new system would save us around a third of our heating costs.
From the outset there were problems with the system, which cost us over £13,000. The heaters regularly flashed showing that they were not communicating with the control panel. We phoned and wrote very regularly and had a number of visits from Kilowatt staff. At least 80% of the many, many times we phoned we were promised call backs that did not happen and appointments were not kept.
Eventually, after about 6 frustrating months, I received a very apologetic call from the company owner's wife who assured me that everything would be done to remedy the problems. After more toings and froings, a gizmo was installed which prevented power surges. This seemed to solve the problem but had taken at least six months of frustration and a cold house. The electricity charges were astronomical due to the system not functioning correctly. We were given a cheque for £1000 from Kilowatt which didn't really cover the extra fuel costs.
Once this winter came round, a couple of the heaters failed to come back on. More promised phone calls from Kilowatt ensued, though the problems seemed less serious than the original ones.
Our energy provider has readjusted our monthly payments from £151 to £196 meaning that instead of being one third cheaper, the ERAD system is costing us about 30% more than our previous dual fuel charges.
Having also had to redecorate and replace carpets due to the old heaters being taken out, our experience with Kilowatt has been nothing but a very expensive disaster.