HELP!!! CONSUMER WATCH DOG

ON TUESDAY THE 15TH SEPT.2015 I WENT TO ZARA AND PURCHASED A SANDAL FOR MY GRANDDAUGHTER. THE CASHIER PUT THE SLIP IN THE BAG AND WHEN LEAVING THE CENTRE THE BAG WAS LIFTED BY THE WIND AS IT WAS QUITE WINDY. WHEN MY DAUGHTER GOT HOME SHE LIKED THE SHOE BUT IT WAS TOO BIG. ON ENQUIRYABOU THE SLIP WE REALISE IT WAS NOT IN THE BAG. WE CALLED THE STORE AND EXPLAINED BUT WAS TOLD BY THE SALESLADY ABOUT THEIR RETURN POLICY WITHOUT A CASH SLIP. THE VERY NEXT DAY I WENT BACK, EXPLAINED TO THE FLOOR MANAGER THAT I DID NOT WANT THE MONEY BUT A SMALLER SIZE.. WAS TOLD IT WAS MY RESPONSIBILITY TO LOOK AFTER MY SLIP. SHOWED HIM MY PHONE WHERE THE SMS FROM THE BANK CAME THRU BUT WAS TOLD THAT IT DID NOT SUFFICE. GAVE HIM THE TIME AND ASKED HIM TO CHECK THE PREVIOUS DAY SALES AT THAT TIME TO GET THE BAR CODE THEY NEEDED BUT TO NO AVAIL AS HE NEEDED THE ORIGINAL SLIP. I WAS TOLD TO EMAIL THEIR CUSTOMER SERVICES TO COMPLAIN. GOT THE SAME REPLY AS TO THEIR POLICY IN ALL THEIR THOUSAND OF STORES AND THAT THE POLICY APP**** TO EVERYONE AND NO EXCEPTION WOULD BE MADE. I PERSONALLY WONT BE PURCHASING FROM ZARA EVERY AGAIN. YOU CAN PURCHASE THEIR CLOTHING ON ALIEXPRESS AT FRACTION OF THE PRICE.