Pathetic service from Somerset Mall branch manager

So we made a laybuy during August and settled the total and collected in September. Almost R3000 Rands worth of tekkies, 3pairs. However the one pair was charged R1399 on the slip, but R899 on the box. We only noticed this at home after we collected the laybuy. On Monday 23 September I went to Sportscene StellenBosch with the slip and the box. Unfortunately they couldn't assist me with this issue as it was a laybuy purchase at a different branch. The manager then phoned and sent images of the slip and box to Ettricia aka Etti (Somerset branch manager) as she was somehow in disbelieve. She told Etti that I will be coming that side for the R500 extra they charged us and also because the one shoe is dirty, probably from being fitted. Weird because the day we fitted everything looked fine,either someone exchanged our items in our laybuy or let someone with dirty hands and feet fit our shoes in our laybuy afterwards. Appalling.. I also phoned afterwards, still Monday morning and asked for Ettricia but was told she's on lunch(@11am) , I asked what time she'll be back and the lady assistant couldn't answer me. I explained the situation to this lady AND left my details asking for them to please contact me back. It is now Friday 27th and I am still awaiting a call from this manager!! Pathetic if you ask me. I just want to confirm if they found a clean pair of this same shoe as well,probably didn't even check their stock or checked at different branches. I am very disappointed in this type of service.