Green Star Energy

We joined this company in April 2017 our biggest mistake we was told there was cheaper than eon so switched to them they worked our bills out and said it would be £91 a month only to find out when I ran them 7 months later with a meter reading as no one had been and on line was saying we was £300 in credit to find out that we are now £500 in areas so when you work it out we would have paid over 1100 in just seven months there bills are not right what so ever we live in a 3 bed house not a mansion proper cow boy company ??????