Unhappy about the service rendered at the TFG stores

I first went to Sportscene in West gate I asked for size 8 Nike sneaker and the consultant put the box at the till I paid and left when I got home I realised that it’s size 7 I went and returned the sneakers then I decided to go to Total sport in West gate to buy there and consultant did the same exact thing but this time he gave me size 9. It seems to be an ongoing trend of them not being honest when they don’t have a shoe size and selling incorrect shoe sizes