Changing log in telephone number

GB Gang ~  been on Gunbroker over 20 years but dormant for the past 3 years.  I changed my telephone number 3 years ago thinking it was permanent, not the case.  I've since lost access to the phone number and didn't realize I would need it to log in to my GunBroker account.  Well, I do.  I need to change the telephone on the account so I can log in so I can list to sell about 20 guns; can't do it.  I've written in  3 times through the “Contact” page for the past week with no response.  If anyone has an idea how I can log in to my account I would be extremely grateful as I need the positive feedback record I have for the past 20 years to help in selling these guns.  Thanks in advance for any help.

Regards, MCB