Waste of money

The product worked fine on the first day and now it doesn't work as described on the advert. I've never been so sore (both side) in my entire life. I cannot wear it for more than 2h. Other then the product itself, the delivery system was also misleading I choose a 5-8 days delivery when i placed the order but the product was delivered a month later. What made me even more annoyed was the fact that I had to pay for the post charges because apparently the sender didn't use correct stamp or pay the full charge. :@