Hello, you will not get Bedrock edition free if you purchase the Minecraft: Java Edition.
I also am not sure how to answer your second question. Please clarify.^TK
If you submitted a ticket you should see a ticket number sent to your email. I suggest sending another one in this case if you didn't get a ticket nuber. ^TK
Thanks for sending in that ticket! You will need to wait for assistance through ticket but if you send me that ticket number I can take a look to make sure it made it into the correct queue. ^TK
Hm, that first issue may be a bug. Please search our bug tracker for a matching report: msft.it/6014w6bhp. For the Wither, this sounds like how the fight is supposed to go. If it's taxing on your device, I would first recommend adjusting your settings for performance! ^NS
I definitely understand how that could be frustrating. Unfortunately the Support team doesn't handle bugs; the best place to check for updates is the bug report page that you linked. If you have new information about the issue, feel free to add a comment. ^NS
Payment errors can happen in different steps of the payment process and be caused by a number of reasons, so they're sometimes hard to troubleshoot. However, we also recommend trying in a different browser or clearing your cache. ^NS
Thanks for trying all those steps, I'm sorry you're still running into the same issue. Definitely contact us at msft.it/6010w6btj if you haven't already, and our Realms team can look into this for you. ^NS
Since you've migrated, the old password reset won't work. Make sure to select "Microsoft Login" in the launcher, and click "Forgot password" from that screen instead. Or, check out this Microsoft article for other methods: msft.it/6014w6bSw ^NS
It's hard to say what's causing the issue without seeing your account. Go ahead and contact us at msft.it/6011w6biB with your account information so we can look into this for you! ^NS