<human>: I'm in Australia and buy every week from ASOS.com (an online clothing store based in the UK).
I have been a customer for two years, returned many items and always been refunded (sometimes it has taken a long time and have had to provide proof of postage / tracking, but it always happens).
This time however - I returned 3 large cardboard boxes and 1 large satchel, over $800 worth of stuff so you can understand why as a student I'm pretty upset.
 I used a courier company, and so I have postage receipts, tracking details and confirmation of delivery back to the ASOS warehouse (plus I have the signature and first name of the person at their warehouse who received the parcels).
I returned over 60 items - more than usual but I always return at least 20 in one go as it is cheaper. I was refunded for 4, so I know they opened at least one parcel.
Out of nowhere they email me and say I'm banned from shopping with them in the future, and I will not be refunded for my items, and they will not return them back to me. (I think they were suspicious at the amount of items I returned).
Note, all the items were new, had labels/tags still attached and were in their original plastic packaging.
PayPal says I can open a dispute, but it may not be successful.

Give me the gist of the text in a nutshell
<bot>: Is it legal for an online retailer to withhold both my returned items and my money, even with proof they received the parcels?