****py service

I bought a clip card at a service station the lady that assisted gave me the incorrect one, when I saw she gave me the wrong one I told her to change it she then refused to and said that I should leave the clipcard with her and she will see if anyone asks for a clipcard with that destination , 1week went by and no one bought in this time I called the contact centre and they said I should post it and explain the situation , I then fetched the clipcard and posted it , they eventually sent me an expired clipcard yesterday and they were suppose to give me a cash difference , so instead of just sending a voucher they send me and expired thing I am so angry because it is a loss for me ,