Cross trainer jabulani mall violates customers cunsumer rights

The customer service i recieved at cross trainer jabulani mall was not satisfactory. I bought a nike shoe on friday 30/03/18. My child wore it on Saturday only to find the shoe had a defect. It was properly stitched by the supplier. I took the shoe back to the store on 04/04/18. We were told they going to take the shoe back to the warehouse for repairs, which was fair and we agreed. The following day my partner recieved a call from the store that the supplier came and fetchec the shoe and has checked it and the shoe is now back with them repaired and ready for collecting. We went to the got the same shoe, we checked the shoe and indeed it was stitched but not by any nike factory as the stitch was in a different cotton a brown one instate of white. They had taken the shoe to a shoe maker not the warehouse as promised. We refused to take the shoe because they were not honest with us. In the mall there is a multiserve store, we went to multiserve and enquire if cross trainer jabulani did not bring the shoe to them. They confirmed our doubts that the kiddies nike shoe was brought to them by one of the store assistance from cross trainer jabulani store for fixing. Cross trainer jabulani denied this. We refused to leave the store because we wanted a refund not the shoe anymore. They called the mall security and threatening to call the police on us if we dont leave the store. They violated our consumer rights. They were not fair and honest with us. With the matter. The shoe has no warranty anymore because a third party has fixed the shoe.