What alternatives do I have for entering Thailand after my Non-Immigrant O visa application was denied?

Thai Visa Centre

Two suggestions

Take screenshots for every page of applications so that you will at least understand what they say next time. Have someone else proof read your application before submitting.

If you misspelled your name, that's a good indicator of where the issues originated. Thai immigration is not known for overlooking anything submitted incorrectly, including spelling errors.

as long as you're not Ruud to the immigration people :) good luck, joking aside

Given the large number of basic spelling errors in your post, you don’t have a strong argument for questioning that as the cause of your application refusal.

Yes you did apply, the file you mentioned acknowledge that. But, acknowledgment of application doesn't mean your Visa is approved. This is my understanding from reading what you mentioned.

You could apply to the Non-Imm-O Visa AGAIN, before you fly to Thailand. Enter Thailand visa-exempt and get stamped in for 60 days. Then when the Non-O visa gets issued while you are inside Thailand, print it and exit Thailand, for example go to Laos or Malaysia or fly to Singapore. Stay there for a few days. Fill in and submit a new TDAC and re-enter Thailand, and activate your Non-Imm-O Retirement Visa.

Can't you submit the application again and change you day of departure?

In July you said you had the non O and now you say you haven’t. What’s going on?

Depending on your travel history in Thailand, you can get 60 days on arrival visa exemption. In the last 30 days go to the immigration office for your district and apply for a 30 day extension. This costs 1900 baht. You also need to fill in a form (TM7), have a passport photo and a copy of your TM30 (your hotel can give you this).

Yes still getting 60 days on arrival. Then you go to a agent and get 30 day extension

Sounds like you didn't check your biodata carefully enough before submitting your application. The OCR used on the evisa site is notoriously inaccurate.

Currently visa exempt entries are still 60 days and you can extend that for a further 30 days at an immigration office inside Thailand that serves the area where you will stay, so if you were only coming for 90 days that's the solution.

If you were hoping to get a 12 month extension of stay before the 90 days ran out then you need to apply for that 90 day Non-O visa again. Unless you already have a Thai bank account you won't be able to apply inside Thailand, and not all immigration offices can issue that visa in any case, so you will most likely have to leave Thailand to a nearby country and apply again using the consulate that serves the location you choose. The application process itself is identical wherever you choose, check your biodata carefully before submitting.