Economy Energy

Hi I am waiting for the return of my credit balance of over 500 since August when my contract ended. I am told every time I call that it will be in my account in 1 week. I have asked to Speak to a manager,complained and e mailed. No reply or help. I would like to know what is happening. Whether I should go to the small claims court immediately . I am a single mother who took on this account to be sensible with money. Now I cannot heat my house and my daughter has asthma. It is extraordinary that last January 2018 direct debits were increased due to ‘government instructions’ , is this fraud? The increases led me into this credit and now I can’t get my money back. Patricia