"Failed to send text message for two-step verification" error when trying to sign in

I have a dropbox account that I have been using for over a decade, but a few months back switched to google driver as my primary data backup and didn't pay much attention to my dropbox account. I had 2FA turned on my dropbox account and had dropbox logged into my phone and personal laptop.

Just 2 days back I switched to a new personal laptop. I cleaned out all accounts and data from my old laptop as I'll be giving it out in an exchange offer. Now, basically I'm logged into dropbox just on my android phone.

I am trying to login to Dropbox on my new laptop, but for 2FA, dropbox is neither sending OTP (is says sent, but none received) to my phone (same phone number), nor sending any prompts to approve. Unfortunately I never backed up the dropbox security codes either. I also don't see any option to disable 2FA in the phone app, or any other way to bypass the 2FA or get support. So, I am just stuck with dropbox access on my phone now, which makes it pretty much useless for me.