I'm assuming you have a retirement extension and not a visa.
You go to immigration with both passports, and they'll move your stamps from your old passport into your new one.
Requirements vary by immigration office. Some just want copies of your current extension, whereas some want copies of every page in your old passport. You'll need to check with your immigration office to find out their process.
Wise is now using Kasikorn as their clearing bank, instead of Bangkok Bank. That means all money entering Thailand goes to Kasikorn first, and then to your account.
You can ask your bank if they can contact Kasikorn to get a credit advice showing your transfers as international, but they'll probably say no as they don't want to do that work.
That means you'll need to go to Kasikorn and get it yourself. It will help if you bring your Wise receipts so they can find the transfers faster.
because they were caught with their hands in the cookie jar with the big Chinese account scandal. Now they're overreacting trying to look tough. And in the process they're taking it out on all foreigners. Other banks didn't get caught in scandals and hence are not having these issues.
if you have a history of high balances and transfers then they can assume that's normal for you account and that you can be trusted with higher limits. For low utilization accounts, no need for more than 50k per day.