Sixty60 deliver but don't collect if wrong

Sixty60 delivered two bags of unknown content to our house yesterday. The delivery address details were incorrect, a mistake made by whoever ordered. The Sixty60 helpdesk have not contacted the person who ordered nor have they collected the two bags. It could have perishables, I am not opening in case I am accused of removing contents in the event of a dispute after collection. This is most inconvenient and the helpdesk is quite frankly useless. I have checked the recipient name provided and no such person resides in our estate. This I have advised. No action has been taken by Sixty60.