Call busy from one number to extension

Goodmorning,
when I call from a number and choose the extension via IVR, it always gives me BUSY, while if I choose others it works. I did other tests from another number and it makes me call that extension. until a few days ago it worked, then to do some tests from that number (I’ve done a lot) I think he banned me or put me on some blacklist and I’m always BUSY. I tried using the Blacklist module but nothing appears.
how to solve?
Thank you

Is this extension registered to an IP phone?
Some phones have a blacklist option, so it is possible that your number has been blocked on the endpoint (phone) and not on the PBX.

Anyway, please paste the Asterisk log for a failing call at pastebin.com and post the link here

You can also just post the eight last characters of the URL

The problem was in spa122 configuration.I was added my number , dont know how, to Block Last Caller.

Thanks for reply.

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