Hi Terriann, can you please share the case numbers for your support tickets? I can try to follow these up for you.
Potentially though, if you were submitting support tickets through myaccount.myob.com, these wont be going to the right place.
We have a dedicated developer program that you will need to apply for. You can check out all of the details at developer.myob.com and to submit an application for API access you can go here
We also have a board in the Community Forum for MYOB Business API / Developers here so you can connect with others and see previous questions/answers around this.