Poor underwear quality

I bought underwears at Truworths The Glen after 2days they started tearing up....u know i couldnt take them back because it's underwear and i already used it...so i contacted customer care to tell them of this dilemma and they liaised with the manager of The Glen stores who said i must bring the unzderwears to the store and they will take them for quality check...imagine that i must take my underwears that i already used to the store...i told them over the phone that i don't feel comfortable to do that...then the manager of Truworths The Glen said there is nothing she or he can do sort out this matter...Who in their right mind would take their used underwear to someone...I must take it underwear back to the store(that's humiliation number 1), then my underwear will be taken to the quality people(that's humiliation number 2)....so my used underwear will go from pillar to post really Truworths???? and what irritates me even more is that i was told there is nothing we can do if you don't feel comfortable to bring your panties.....NO APOLOGY NO NOTHING.....And they were not cheap u know....i paid a small fortune for trash....i normally buy somewhere else but i decided to try Truworths.....Biggest mistake of my life