Dissatisfied with Customers Service

I have recently used your services I was quite happy until recently that I purchased on 08 June 2022 at Mr Price Hillcrest corner

I am complaining because I felt the correct procedure of the customer service was not initiated to resolve the problem at hand,so yesterday I went to the store and saw your current promotions of buy 1 get 1 free ,I bought a jacket and got the chino free (Kids Clothing).As soon as I got home I realised that the pants don't fit my son

When i first learned of this problem, i thought I'd exchange it for a bigger side today unfortunately a bigger size wasn't available so I took another pair of pants and went to the till before this upon entering the store I asked what is the procedure of doing the return,I was told to take my preferred item and head to the till to my surprise I was dissatisfied with the response I got from the two workers at your company, i was told that nothing could be done about my problem because the pants were a gift hence I got them free it was as if am a street begger who was just given an item out of mercy . the other employee suggested I give the item to a distant cousin or whatever cause I cannot take something else the audacity to say that to my face in front of a long queue and she took the pants put them on a hanger and left them elsewhere I had to initially take it my self from the hanger put it back on my shopping bag , I believe that this response is unfair because I have to Keep an item that doesn't fit my son the solution your employees came up with was to hand the pants to a distant cousin if mine . I would like a written statement explaining your company's position about the solution your employees came up with and what you will do about my complaint.