Wrong order given to vegetarian

I visited wimpy M1 oasis on the 3 May 2015 at 01h21. My order number was 242. My order was toasted cheese on white, toasted cheese on Brown, toasted chicken mayonnaise on white. My mum and I are strict vegetarian due to religious reasons. My order was a take away as we were traveling. On the road we started to eat to our disgust the entire order was wrong. Toasted chicken on brown, toasted cheese on white was correct and then toasted chick on Brown again. My mum had a bite of the wrong sandwich and realized it was chicken. I was way out and could not turn back. I contacted the restaurant the next day and they apologized and said they will refund me for the order. To me this is totally unacceptable as this shows that no one cares for our religious rights. I would at least like some vouchers for a larger amount as I feel that would satisfy the wrong done to my mum. I await your response to this issue as I want to see how we are respected. I have sent 2 emails to wimpy and still no response even call and spoke to mailroom and emailed him on this address [Email Removed]