Upgrade gone wrong-Poor,Poor Service

We received poor service from Vodacom. My husband upgraded his contract in the beginning of August 2020 however the phone he received was the wrong phone instead of receiving an A31 he received an A11 and when he queried it he was told it's not them...it was a store sub contracting under vodacom called foursquare. Till to date we are awaiting someone to call us back, to arrange for the pick up of the phone so we can get the correct phone. He has been a Vodacom client for over 15 years and they treat him in this manner. Everytime I call I am told that I am not the contract owner yet they have not called the contract owner since he raised this query. All we want is the correct phone to sent to us because the upgrade will be in effect September 2020 with the phone that was not agreed upon. We are just disappointed in the poor service and us doing the follow ups.