if i have sent messages and a text to a buyer over an unpaid item and opened an unpaid item case, do i just close it after 4 days?

[save4cworld]

I have open a unpaid item case on monday foe an item that had not been paid for 6 days after the sale with no contact from the buyer, i have sent the buger an ebay message and a text message, still noe contact, do i just close the case tommorrow if i have not recieced payment or contact from the buyer? Thanks for your help