Angus 60% increase in direct debit, followed by excessive in credit balance, followed by APP advising no direct debit would be taken in September, followed by full direct debit being taken. Also advised APP not displaying info as it should. Asked for response to FALSE information on direct debit on APP and APP failure. NO RESPONSE in the time frame they advised. Tried contact through appropriate method in APP they advised I should contact via other method! Asked for credit balance back as monthly D/D covered more than enough, NO RESPONSE. Decided to switch user & advised credit balance would take 40-45 days to be repaid. The disrespect for the customer is appalling. My DD covered more than1/10 th of my annual projected bill!! NPower accrued 37% of my annual bill in credit.