Spree's refund process is ridiculous

I ordered several items from Spree, some of which needed to be returned and a refund issued. The items were collected with no problem and the online return status changed to \Product Received". This was on the 25th April 2015. It is now the 23rd June 2015 and I am still waiting for one of the three refunds. I have been in constant contact on their call centre and each time the lady assures me the refund will be sent in 3-5 working days"