Bad service and i feel disrespected

I am so angry currently at Maponya mall woolworths to return a white and grey top i bought and only fitted it at home only to find out that it doesnt fit as i have gained weight. I got here and advise the 1st guy at customer service my story and told him that it has my lipstic on all i want is either get the correct size ot get something else. He said he cant help and i spoke to Masako, Humphrey and Phephi who all claim to be branch managers. Peppy without saying much she is implying i wore the top hence they cant change it...i asked her if i take the same top and go to their fitting room im wearing my lipstick and same thing happens will she force me to pay for the top..i get no answer for this yet they expect me to keep the top that doesnt fit. The only difference is thay i was at home when i fitted the top...if they had a policy that all clothing must be fitted in the shop then i would understand. I honestly feel humiliated and discriminated against. I have been here from 9:45 till 10:15 and now I have been here from 11:15 and now its 12:55 waiting for Lefentse Madiba who i am told is in a meeting/ enquiry takes priority for her to attend to my request and she will be on it the while day.. Its just sad that we get such a service from out local stores..i am really disappointed and need urgent attention.