Petz Carrying Straps

The straps aren't bad for the price, however they have already partially broken on me and they're very short for my cello case. They also have no protector from stopping the padded part of the strap sliding out of the other part, if that makes any sense at all? The woven part at the bottom hasn't been folded over and sewed so it's happened me a few times now where it's just slipped out and you have to be very quick to catch your instrument!