Cannot find the link to request an increase in the usage limit

Hi,
I am using ChatGPT as part of my research project and the default API usage per day is not enough for me. I tried to use the chat to find out how to increase the limit. However, the replies I got only told me to find the “Need Help?” button at the bottom of my usage page. The problem is that I cannot find this button. I’d appreciate it if anyone could help me with this. A link to the request form to increase the usage limit would be appreciated.

Thanks in advance!