necklace

my husband bought a necklace, after a week it got broken apart i went to sterns to enquire regarding the product and also if they can repair it. ****arney mall branch, the consultant told me its useless to fix that necklace because it will break again after a week and will keep breaking the product its like a useless item, i then asked him how is it possible if thats the case it was sold to us like that why if they knew the product its not of good service. he could respond to me instead he took it and felt it by checking it and said he cant fix it, it will still not work but if i insist he will fix but it will break again. am very disapointed and hurt the amount we spent R1300 for that, all went down to a drain. i still have a broken neck piece of which now its a useless item.