Broadband contract renewal

Trying to renegotiate new contract since NOS is double the price of competitors eg NOWO.

Visited Guia store who could not help but scheduled a call from retention team.

Promised call never happened and spent over two hours trying to contact the team but continually transferred on to a holding line that never gets answered. No email address available to register a formal complaint.

The customer service of NOS is appalling and one wonders how they retain customers.

Any help with this really appreciated