Account Query

Am really not happy with the service I received from Lewis store, I bought Item on credit through them that finished in December which was debited in January but the item was no longer showing on my account, worse I went to store to request for a refund the person who worked there did a return on a wrong Item which is still active. now my account shows in arrears, I now debited again for the same item and an item that i finished paying in January but debited in February, When I asked the lady instore she advised the was a submission of 46 month debit to go off on a 12 month instalment plan, The inconvenience of having to take my money get a taxi and go instore for a refund on a mistake done by them. and speaking someone who advised me that the money debited maybe allocated to the Item that are not finished yet, THAT FRUAD for me as the no such agreement between me and them. Worst went i went in store in January the lady said she was confused seems like their staff doesn't know what they are doing course even the gentleman didn't give me correct information