Bad online service from Converse

I bought a pair of sneakers online from Converse in November last year. I did not receive them on time then I cancelled my order in December. As we speak I have not received my refund, worse every time I call your call centre, it is always busy. I have provided you with all the required information to process my refund and still I have not received it yet. This time around you provided me with the worse service, I don't see myself buying anything from Converse online or encouraging anyone to buy your products online.