Shocking customer service from Netflorist

I placed an order with Netflorist on the 22nd of May 2018. The items I ordered were clearly stated to be available for nationwide delivery. I got an email later in the day saying that my order could not be fulfilled and was told that I would be refunded within 5-7 working days. I tried speaking to customer service with regards to this, since the fault was on the side of their site , not mine therefore I should not have to wait. However this was met with poor service , which clearly seems to be the policy of Netflorist. Today on the 7th working day since the cancelled order, I enquired on my refund and suddenly it the refund time has changed to 7-10 working days while their customer service employee Heather clearly stated it to be 5-7 working days in a previous email. Every time I have contacted Netflorist I have received disgusting service. In one case I posted about my griviences on Facebook and they were quick to respond saying the that fault was on my part, which I quickly disproved using screenshots of their site. After disproving their accusation I got no response in typical Netflorist fashion. I would not recommend anyone to place an order using this site. Their delivery service is poor and their customer service is honestly the worst I have ever encountered.