BAD SERVICE FROM ACKERMANS SOUTHERNWOOD EAST LONDON

BOUTGH A PHONE FROM THE STORE AFTER 3 MONTHS GAVE ME PROBLEMS AND I TOOK IT BACK TO THE STORE. I WAS TOLD TO WAIT FOR 21 DAYS AND I DID , NOW EVERY TIME I GO THERE I AM NOT GETTING ANYTHING TENGIBLE FROM THEM THEY KEEP ON SAYING "COME BACK TOMMOROW" AS THEY DONT KNOW WHEN IT WILL BE BACK FORGETING THE INCONVINIENCE IT IS CAUSING ME. NO ONE IS GIVING ME ANYTHING TO SAY WHAT IS CURRENTLY HAPPENING REGARDING THE MATTER AS THEY ARE ALL NOT SURE WHEN IT IS COMING BACK. THIS IS REALLY FRUSTRATING COZ THEY CANT EVEN TRACE IT OR SHOW ME THE CURRENT LOCATION OF MY CELLPHONE.