As a landlord I deal with many energy companies, but Scottish Power stands out as being by far the worst and virtually impossible to deal with. I have spent many hours on the phone and have sent numerous emails to explain that I have paid their invoices, in full, for a property that I have now sold, but they still send me invoices, with added “collection charges” and threats of further action. After spending several hours waiting on the phone I eventually spoke with an operator this morning, who told me that credit balances were not repayable, he could not help and that I must speak to “customer services”. The behaviour of this company is either shockingly incompetent or bordering on criminal. Avoid them at all cost.