foschini retail online bad service

I placed an order on the 12 February 2025 for wide leg pleated mini pockets pants navy in colour and size 8 from Foschini online. The normal price was R559 and it was on special i bought it for R299 the trouser is available in three colours but only navy was on special, I received my order on the 14 February ,but i was not happy with the trouser because was used and returned back to the store.it has ***** in between the legs and was stinking.i logged a call with a request to exchange the trouser even though it can be a different colour but same trouser hence the navy one was out of stock. However they refused instead they gave me R100 voucher with lots of terms and condition and also a short period to use it before it expires hence they mentioned they dont want to loose cause i cant change to a different colour however they accept the service they gave me was bad. and they forced me for a refund.i dont want a refund i want the trouser. How could they accept someone to return a trouser in such condition and be sold again to someone else?however the trouser was still tagged.