PATHETIC SERVICE FROM MAC

I ordered on Black Friday and it was the incorrect item. I requested a refund as soon as the product was received at the beginning of December 2017. I had to phone numerous times and eventually got refund form from them which i returned the same day and it was acknowledged. A few days later I emailed them to ask about the pick up of the item and was told the form was never received. I sent it again the same time. No response. I phoned a week later to be told Dawn Wing will contact me to arrange pick up. After many calls to dawn wing who could not assist without a tracking number and emails to Mac I eventually was contacted by Dawn Wing who promised to collect the item before 4pm on 20 December 2017. This never happened. on 21/12/2017 Dawn Wing phoned again to say they will fetch the product on this day. To date this has never happened and I have never been contacted by Mac despite 7 emails and 2 phone calls after this date. Dawn Wing is of no assistance cos they fail to understand the difference between pick up and deliver. Its now over a month later and I am out of pocket for the money as I went into a Mac store and bought the correct product thinking the refund will be within 7 days as they stated and which is falsely advertised on their website. Don't buy from them as once they have your money the customer service is pathethic.