Error calling Google Cloud function - limits exceeded

I am calling a GCP cloud function from salesforce, integration working fine, now I am getting the following error. It seems I have to increase the quota, but my billing account do not allow me to open a support case. It will cost me $29 for basic support.

Is there anyway I can increase the quote for my cloud function allocation myself ?

You have temporarily exceeded a Cloud Shell limit. To increase or reset your quota, please file a support case

Any pointer is appreciated. I am stuck at this point.

Thank you,

As @John Hanley mentioned, To change the quota, you must have paid support and billing enabled for your project. You install the Google Cloud tools on a local system so that you are not consuming the Cloud Shell quota. You can read more at these link1 and link2

You can request a higher quota limit as follows from the console:

• Go to the Quotas page: Page
• Go to Quotas On the Quotas page, find the quota you want to increase in the Quota column.
• Select the checkbox to the left of your quota.
• Click create EDIT QUOTAS. The Quota changes form displays.
• In the Quota changes form, enter the increased quota that you want for your project in the New limit field.
• Complete any additional fields in the form, and then click DONE.
• Click SUBMIT REQUEST.

All these steps are listed in the documentations

Viewing the quota increase request status: click_here

Maximum quota to be approved is 50 hours per week with Contacting Support and providing project-number, etc.