Poor service from MrPrice

My Grandmother of 87 years old bought me 2 pairs of pants o e of the pair was incorrect size I stead of 34 she took a 32, and she bought herself personal stuff I presume

Before leaving g the store she asked the gentleman and explaining she is not from Cape atown if the pants is not to my liking I can change it for a pair I like,the problem I like the pa ts very much but the one is incorrect size, I don't have the slip because she bought lots of other items so that's why she asked the gentleman can I exchange the pants without her being present, they assured her ofcourse he can, so now that I finally got my gift, I noticed when trying g on the one is to small, I took it to Mr Price where it was purchased and then rudely the ladies behind the counter just like this (where's the slip) I explained and she took the pants to someone in the back came back, OH the tag was stil on the pants, with a attitude and just no the pa ts were worn, clearly it has not been you can see its still stiff from the newness, no other assistance were offfered to what we can do, I was dismissed, I said I am contact your head office, this is unexpected from a store

I would appreciate of someone can call me back ASAP regarding this matter

Lee ***