We purchased membership for two of our great grandchildren at Durham park on 18th February but as yet we have not received anything, I have phoned twice and been told there is no record of the membership, I've emailed the receipt and also sent a photo of the receipt and the green form we were given when we paid, we have had absolutely no.feedback from National Trust despite someone on one of their Facebook pages trying to help me. I find this disgusting, I'm feel like I'm banging my head against a brick wall