Marketing management jobs in English are likely to be few, probably for International companies only. Search online there a few websites worth checking. This is not a Thai protected role.
It will depend on the bank, when i dont use my account they send me a message saying "your account will be closed in 30 days if you dont make payments" or something like that. Phone the banks hot line they can tell you there policy
Your son is technically on overstay, but no action will be taken and because its a short time and your proactively trying to resolve the issue it will be fine.
well luck the credit card was with CITI bank, but they passed on the business to Kbank, it is a proper credit card in so much its not prepaid. And the two debit cards are on 2 accounts.
Kasikorn bank (kbank) there banking app is good, i have debit and credit cards. Plenty of branches, email and english helpline, prefered over Bangkok bank.
The address mismatch should be ok, my DL didn't accept my yellow book but wanted a certificate of residence from my immigration, but each office have different requirements. By Golden visa do you mean the elite?