Vision Express — pre numbered glasses

I ordred prenumbered reading glasses. on receipt i discovered that dispite the label saying +2.75 the power was not correct.
i complained and after some days they responded that they checked with their lab who said it was correct.
not anting to argue i told them that i wanted to return it
they have not responded.
TERRIBLE QUALITY AND WHAT IS WORSE HOORIBLE CUTOMER ORIENTATION.
PLEASE NEVER BUY FROM THEM