Messaged them as still didn t receive my tracking ...

Messaged them as still didn t receive my tracking number they then said they had no stock of my phone in the colour I wanted and that there was a delay however they had white to send me immediately. I said no I wanted the space grey ( which I ordered) and I asked for a refund. They then asked me to confirm the refund as they now had my colour in stock? (This was the next day )and that it would take 10-14 days for a refund to appear in my account. Again I said I wanted a refund . I then received an email saying that the phone had been dispatched? Even tho I asked for a refund and got given a tracking number. Tracking number is invalid and is meant to be next day delivery yet I still haven t received it? tried to phone them but lines are constantly engaged!!! Avoid !!!