No refund

Im seriously so ****ed off! I purchased an item for the first time from egdars online on the 15th august 2017, on the 18th august I received an sms advisng that they dont have stock of the item I purchased and advised that they will refund me, 5 working days and still no refund, i've contacted them twice where ive been advised that they will ask the refunds team to see to my refund asap, I also messaged edgars via facebook where ive been promised the same thing and yet nothing! My next step is to get a chargeback as im clearly not getting refunded by the store, I will definitely never buy from edgars and I sure as hell will be sharing my experience as far and wide as possible!!!