Pathetic Service

I bought an inverter on LeRoy Merlin's online from the Boksburg branch to a very disappointment there is no stock and it show there is availability. After I have reported them on Hellopeter they phoned me and assured me they are getting stock from Little Falls for me to collect Tuesday. I phoned on Tuesday they have not received it yet. I am still waiting for them to let me know whether I can come and collect the inverter. I want my refund becausde poor service and I have all the names who helped me I do not want to name and shame them. I need my refund in cash.