if my amendment refund shows complete when should i expect my refund

can't say because refunds on amended returns come by way of a check in the mail - no direct deposit. 

It is possible to get direct deposit for an Amended return.

Is direct deposit available for electronically filed Form 1040-X? (updated May 28, 2025)
Beginning in processing year 2023, direct deposit can be requested for electronically filed amended returns for tax year 2021 and later. The bank account information should be entered on the electronically filed Form 1040-X (or corrected Form 1040-SS or (prior to 2023) 1040-PR).

From  IRS Amended returns, FAQs
https://www.irs.gov/filing/amended-return-frequently-asked-questions