Faulty headsets

I ordered headsets online from one of their sister shops,after using them in less than 30 days ,they were not chargable,i then sent them an email,they called back to advise i can return them to focshini elloff street,they advised me that i can reoder online again if im still intrested in the same brand of headphones,when i went there they insisted i replace them with the same once,whow ever it did not happen,but i have sighned the return paper work with them,when i checked my statement my money was not reversed