Voucher not honoured

I bought a voucher to use at Salon Sanri at 13 Veronica Street, Constantia Kloof, 082 828 1849<br> The voucher has the Salon's operating hours as Mon to Fri 8 to 6 and Sat 8 to 4, and the conditions on the back of the voucher state - This card is Valid from Monday to Saturday.<br> When I phoned the booking number at the marketing house for my booking I was informed that they aren't using the vouchers for Saturdays and to contact the person that sold me the voucher.<br> I contacted Garth and he advised me to contact the Salon directly who then informed me that it was a printing error and were not prepared to honour the voucher and to get a refund from Garth<br> Garth of course immediately went with no refunds - but as they have broken the terms of the voucher - they should refund