That shows that the Match (Permit) field is probably not set properly. In the Advanced settings for your trunk, set Match (Permit) to 126.96.36.199/24,188.8.131.52/24,184.108.40.206/24,220.127.116.11/24
Submit and Apply Config. Open the page again and confirm that the setting is still in place.
Then, check the contents of /etc/asterisk/pjsip.identify.conf again and the new address blocks should be there.
This should solve the ‘unknown peer’ issue.
Next, in response to Zadarma’s message, please confirm:
On the Codecs tab for the trunk, only alaw and ulaw should be checked. Uncheck all others.
On the Advanced tab, set Media Encryption to None.
Restest. If you still have trouble, post a new log, with pjsip logger turned on.