Quick delivery but no receipt for item purchased.

I ordered fridge online on the 15/02/2019 and it was delivered the 16/02/2019 which made me happy as next day delivery is awesome, however I failed to receive a receipt for the item purchased from your delivery guys. If anything goes wrong how will I prove the purchase was made at your stores? Please provide me with a receipt as this is the only way I can prove the purchase was made at your stores.