The worst service from Makro online shopping experience and after sales service

Very poor service delivery, their online system is the west experience i have ever had, i paid for a few things online and went to pick up my order after payment was confirmed and was told to wait for an email that would be sent to me, because i had bought things i needed urgently, i then paid for the same items and then cancelled the order, it has been three weeks i still have not received my full refund instead i keep getting a refund for one item per week, the most frustration is that i keep calling every week and i am told that my query has been escalated i just want my refund and they have lost one customer due to their ****ty service i am appalled by the kind of service and their online service need to be reviewed and changes need to be done