Walmart complaint: Secret Treasures

First off I love secret treasures. I found out about them almost 3 years ago and fell in love with the fit and material until recently. Sadly to say, I may have to change to another brand..
Sure I am a heavyset girl whose thighs rub but I used to have no problem with Secret Treasures until they changed the way the underwear are made now. Where it sits in the inner thigh used to be I guess bulkyish (lack if better terms) but now has been replaced with no seams which is flatter. Now it runs my inner thighs raw and the material is so thin now that it has ripped a hole right there. The hole came from a one time use of a brand new pair I just bought last week! I dont understand why change something that isnt broke but now causes issues?? I am so disappointed and sadden to have to look elsewhere for better underwear that fits my budget.. I am sure this will not get to anyone but I want this heard.. Thank you for the first underwear while the make and material had lasted..