No harm asking but doubt Customer Services will oblige, once a Business Account is made it cannot be reversed back to a Private account, it looks like you'll need to open a brand new Private account, start that from new.
As said no harm asking , explain why it was opened, but I recommend only speaking to Dublin, they usually appear first thing when lines first open for live agents, 9 a.m. weekends , 8 a.m. weekdays.
This is the easiest and quickest way to contact eBay Customer Services, for a Call Back option.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
Lines open 8 a.m. - 10 p.m. on weekdays
9 a.m. - 6 p.m. on weekends.
Automated agents will be available on chat outside of the above hours.
As said, recommend contacting CS first thing in the morning as there's more chance of Dublin answering.
@inzektsix-cards