Bad service and attitude

I went to Scrap a doodle to buy vinyl for my t-shirts.I asked the lady which vinyl was for t-shirts as I'm going to use a heat presser.<br> She showed me which one's to buy as it was the first time I was buying from them.<br> I just found out that it was the wrong material.I called the store only to tell me that they cannot take it back if it has been opened.Mind you that the vinyl does not have instructions.the vinyl they gave me was for signage.<br> <br> Instead of apologizing for their mistake.They vouch that the lady would never give me the wrong thing and they will not be replacing or repaying me back.