Want to verify my phone number

[#1]

I want to verify my phone number but every time I tried to add it it says 

(You have exceeded the maximum number of attempts to add this phone number. Try a different number or contact Upwork Support.)

Now how can I solve this and add my phone number for verify and security?

[#2]

Hi Protick,

Thank you for your message. I'll have one of our customer support agents reach out to you directly and assist you further.

Thank you,

Pradeep

[#3]

okay thank you