SSH port forwarding.

Hello,
I created an SSH account on https://www.sshpower.net/ website and I want to use for tunneling my connection. The website showed my account information as below:
Code:Host: s7.sshpower.net
Type: ssh
Username: sshpower-username
Password: catdog1365
Expired At: 2021-05-05 21:09:07
Dropbear Port: 143,443
SSL/TLS Port: 80
OpenSSH Port: 22
Squid Port: 81,8080
Bandwidth: Unmetered
Port Speed: 1 GBpsThen, I tried below SSH commands to make a tunnel, but it failed:
Code:$ ssh sshpower-username@s7.sshpower.net -L 8080:127.0.0.1:8080
<br>
<b><font color="#e00f4e">[[ PREMIUM SSH ]]<br>
</font>
</b>
<font color="#aa1257"><i>Don't forget to support:</i> <br></font>
<b>
<font color="#e00f4e">SSHPOWER<b>.</b>NET</br></font>
sshpower-username@s7.sshpower.net's password:

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Connection to s7.sshpower.net closed.And:
Code:$ ssh sshpower-username@s7.sshpower.net -L 143:127.0.0.1:143
<br>
<b><font color="#e00f4e">[[ PREMIUM SSH ]]<br>
</font>
</b>
<font color="#aa1257"><i>Don't forget to support:</i> <br></font>
<b>
<font color="#e00f4e">SSHPOWER<b>.</b>NET</br></font>
sshpower-username@s7.sshpower.net's password:
bind [127.0.0.1]:143: Permission denied
channel_setup_fwd_listener_tcpip: cannot listen to port: 143
Could not request local forwarding.

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Connection to s7.sshpower.net closed.And:
Code:$ ssh -R 443:localhost:1234 sshpower-username@s7.sshpower.netWhich part of my command is wrong?

Thank you.