FALSE GUARANTEE

I BOUGHT A TABLET FROM THE MENTIONED SUPPLIER IN N1 CITY, GOODWOOD, CAPE TOWN. I RECEIVED A 2 YEAR GUARANTEE ON MY SAMSUNG TAB E, THE ONLY DAMAGE THEY WONT COVER IS WATER DAMAGE. I ACCIDENTLY CRACKED MY SCREEN, NO INTERNAL DAMAGE TO THE TABLET OR SOFTWARE WHATSO EVER. HE TOLD ME THE CHARGES WOULD BE R500 TO REPAIR. I ASKED HIM WHAT'S THE USE YOU GIVE GUARANTEE THEN? BUT I WANTED THE THING TO GET FIXED, SO I LEFT IT WITH THEM. 2 MONTHS WENT BY AND STILL NO CHANGES HAS BEEN MADE TO MY SCREEN, WHEREAS HE COUNTLESS TIMES TOLD ME TO COME BACK THE NEXT WEEK, THEN AGAIN THE NEXT WEEK AND SO THE CYCLE CONTINUED. I EVENTUALLY WENT TO TAKE MY TABLET BACK AFTER 3 MONTHS WITH THEM AND YET STILL LOOKING THE SAME. WHAT'S THE USE YOU GAVE ME A GUARANTEE BUT YOU CAN'T COMMIT TO IT? HIS ONLY EXCUSE WAS: \SORRY SIR