that is on your profile.   Just tell TER what the new number is then.   They will change it once they verify it is you.

I recommend that you ask TER to link your handle Tiffxoxo to your Profile (whatever your profile name is: Tiffanie? Tiffany?).  You may have to prove that You are You to take ownership that way.  I assume you have an Ad someplace?  Does your Ad email address match the (hidden) email address you gave to TER?  The phone number in the current ad would "prove" that you have a new phone number.

find out more about you. Your website will have a "contact" tab and there I would find your correct phone number. If there was a discrepancy with phone numbers, I would either call each number separately or attempt to contact you either by email or PM here.

But yes, do update any incorrect info in your TER profile.  

I hope you have a separate number for your "provider" phone.  Frankly I'd not  run a phone number in ads but would have an email contact.  After what ever screening you do, the prospect would hget the number to your "private line".  Neither your phone nor email should be directly connected to your real life personna.