I can´t receive an app transfer on iTunes Connect

I´m trying to receive an app transfer on my iTunes Connect account, but I can´t be able to do that, because the form to accept the transfer is throwing me this error:

The phone number must be in a valid format. Preface the phone number with ‘+’ followed by the country code (for example, +44 844 209 0611)

It is impossible to continue and I don’t know how to get more help.

Solution 1:

• If you are unable to initiate the transfer after reading the how-to, contact developer support.

• If you don't see that a transfer in has arrived when the sender sees it processed, contact developer support.

• If you have gotten the software to accept the transfer and you just need to wait a day for any bulk processing, then wait a day.

Last resort, https://developer.apple.com/support/