Not received new mobile

[LINL8]

I did not receive my new mobile on delivery date.  Dpd did not deliver on set date and then I paid for special next day delivery and still did not receive it.  It kept saying it was at the dpd depot but then they didn't know where it was.  It has now been nearly 12 days since it was supposed to be delivered and I have called Sky and dpd repeatedly - they kept saying they were going to change the delivery date or look into it but it never arrived.  Today both companies tell me dpd has returned it back to Sky.  I do not understand why this would have happened as I have been in touched with both companies regularly and almost daily.  Anyone else experienced this issue? 

[caesarome]

@LINL8 

If Sky told you today that it is on it's way back to them did you ask why this has happened as usually one reason would be if you have failed the second deeper credit check that takes place so when you speak to them again ask them if this is the reason why.