Mweb VOIP- pathetic migration process and customer service to upgrade package

Mweb recently migrated its voice over service from pay-as-you-use to monthly package basis. After migration, I attempted to upgrade my package but was unsuccessful because (a) Mweb did not (yet) update their website allowing users to make account changes online for this, as it does for all other services. (b) The call centre has long waiting times and is not toll free. (c) I manged to eventually speak to a call centre consultant and requested upgrading my package, however, its a week later and the change is not active. I ran out of airtime on my Mweb product. (d) The only way to raise an issue or follow up is through the call centre or raise a query, which is extremely unhelpful and i'm still waiting for a response.