Incorrect balance on statement

I've been requesting a statement from Edgars for for for the past 2 months, I eventually received it and it's incorrect. My 2 refunds don't appear on mh statement, also I have had an interest free account for years and now they charging me interest. I go to the store to query this the manager tells all accounts are now been charged interest and they don't know how long it takes for a refund to reflect on the account.