BOUGHT PANTIHOSE OF A BAD QUALITY

I HAVE PURCHASED 3 BOXES OF PANTIHOSE CONTAINING 3 PAIRS EACH IN THE LAST 2 WEEKS OF WHICH THE QUALITY IS VERY BAD. ITS NOT THE 1ST TIME THIS HAPPENS AS WHEN I WEAR THE PANTIHOSE FOR THE 1ST AND TAKE IT OFF THE EVENING IT THEN BREAKS OR RIPS EITHER AROUND THE THIGH PART OR ON THE LEG AND THEIR PANTIHOSE COSTS VERY EXPENSIVE FOR THE 3 PAIRS. THEIR QUALITY OF THE PANTIHOSE HAS REALLY DROPPED TREMENDOUSLY IN THE PAST YEAR BECAUSE IT USED TO LAST FOR QUITE A BIT BEFORE. I AM A VERY DISSATISFIED AND DISSAPOINTED CUSTOMER IN WOOLWORTHS BECAUSE YOU DO NOT EXPECT THIS KIND OF QUALITY FROM THEM.