Unfortunately yes, and it is one of the more frustrating practices in the prison phone industry. GTL and ConnectNetwork have broad authority over accounts on their platform and can place holds or blocks on accounts when a chargeback or disputed transaction is flagged, even if the dispute was legitimate and reasonable. The fact that they blocked every number on the account rather than just addressing the disputed line is an aggressive response, but it is within their standard policy framework.
The dispute creates a red flag in their system and until it is resolved their default is to restrict the entire account.
Here is what can be done. First, the dispute resolution has to go through ConnectNetwork directly and needs to be escalated beyond the front line customer service representatives who were being unhelpful. Ask specifically to speak with a supervisor or the account resolution department. Document every call, the date, time, the name of the representative, and what was said. That paper trail matters if this needs to go further.
If ConnectNetwork continues to be unresponsive or dismissive, there are reporting avenues available. The Federal Communications Commission handles complaints about prison phone carrier practices and has jurisdiction over issues like this. Filing a complaint at fcc.gov costs nothing and creates an official record. The Consumer Financial Protection Bureau is another option if the dispute involved a billing or payment issue.
As an immediate workaround, another person in the household or a different family member can set up a separate ConnectNetwork account under their own name and fund calls from that account while the original account issue is being resolved. The blocked account should not affect a new account set up independently.
This situation is not right, and you are correct to push back on it.