Looking to upgrade account or buy individual assets, however I am not being given options

Yes, you should be able to licence additional assets at an additional cost per asset as stated in your subscription. I would suggest you contact Adobe customer service on this. Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled, you need to accept cookies! If the chat window fails to open, or is non-responsive, use a different device and/or browser to start the interaction.


For support via Twitter:
https://twitter.com/AdobeCare

(see also here: https://community.adobe.com/t5/creative-cloud-services/how-to-contact-adobe-support/td-p/11875703 or here
https://community.adobe.com/t5/account-payment-plan/how-to-contact-adobe-support/td-p/11843852)



Important: Adobe does NOT contact you unsolicited by e-mail or direct message. If you get contacted by direct message from a person, claiming to be an Adobe employee, look at that profile and look, if they bear the “Adobe Employee” marking under their name. Adobe support does not use Skype to give you support.


If in doubt, ask the forum.

Info on upgrading your plan is shown here. There a chat icon at the bottom of the page if you need additional help.

https://helpx.adobe.com/stock/kb/manage-stock-membership.html

I should add that I have logged in and out of different browsers and cleared the cache as well