Don’t deal with Hellenic Bank, their KYC (it took 2,5 months) is nightmare, my UK LLP business is fully legal but I had to provide soooo many documents, finally they refused. Maybe for personal account they can be more friendly.
As they told it’s up to USD correspondent bank(s) restrictions now, so if you want to process USD payments, you should redomicile company to another jurisdiction or leave as it is and use another currency: EUR/GBP/CHF and bla bla bla (not USD)