Panarottis Gateway manager Misleading consumers

I have 11 vouchers to be used at Panarottis. I visited the gateway branch today and the manager Cartel stated that all the vouchers cannot be used in one order. I asked him for a copy of the terms and conditions for use of vouchers and he said he didn't have a copy and that I should check the website. When checking the website there is nothing stated about not being allowed to use the vouchers in one order. He refused to allow me the use of the vouchers even though I showed him the vouchers are valid and on my mobile application. He insisted only 4 vouchers could be used. He was completely clueless and showed total disregard. This is absolutely unacceptable.