Poor and slow services

I purchased a Panasonic hifi at a Lewis store 251 in port elizabeth and the Hifi stopped working and I informed my PE branch where i bought it and they asked me to return it as it is still under guarantee. Its almost a month now since i returned it but havent been contacted about any progress. I went to Ugie branch to enquire as i returned it via them as i am now residing at Ugie...i was told that their repairs shop is still waiting for the quotation of fixing the Hifi before they can start fixing it...after almost a month though?