A huge incovenience by Spree

I have been using this online retail shop for the past 2 years and up to only about few weeks ago that have been providing good service but the problem started when I mistakenly made 2 payments to them and the second one for another company order. When I realized my mistake I immediately called them and explained and after some verification process I was promised that my money will be refunded to my account within the next 3 working days, and that was on the 23rd of August. I called again this morning after realizing the money is not in my account only to be told it will be refunded after 7 days now, to make things worse the same online shop cancelled my order because I didn't pay in time they say, how could I send another money to them whilst they still have my money? I also lost the other order that was supposed to be paid with the money that they are keeping. Spree please stop incoveniencing me like this.