Shocking service

I had booked through booking.com for the holiday in La montagne and Oceanic on the 16th to the 18th March 2018,which were both cancelled..I wrote an email to them and I was advised refund may take up to 14 working days,it's now a month since I had been waiting for my refund,This is really bad service now I want all my monies due to me by the end of this week!! Or else I'll take it up with the Ombudman