Appalling customer service

I am extremely disappointed with the total lack of support I got from FtN when I reported that a discount voucher I got from my bank was showing as invalid at checkout. I reported it and sent the email from my bank with all the details. Two days later I received an email asking me to rate the service I had gotten. That's when I saw that the ticket had been closed without me receiving any feedback whatsoever! I rated the service with 'unhappy' hoping for a reaction. There was none. I sent another email to customer support asking to be contacted in relation to this. Again no reaction apart from seeing that this ticket is supposedly being processed. FtN has lost 2 opportunities to show me that they care about their customers. Such bad service.