Disgruntled long term customer

How does a company that provides landline not have a proper landline for its customer to contact and they have 5 digits numbers which you can call using a mobile phone while its free for their users. They are inconsiderate towards their customers. I have sent emails and online upgrade request to no response from your side but the audacity to send case numbers (***7 and ***0) and never follow through. This shows how your business has no regard whatsoever for its customers. Today, 5 July 2023, I made a call to upgrade my fiber, but I got cut off, guess what your agent did not even bother to call me back. Talk about customer retention and customer satisfaction. I am very unhappy with your contact channels and I know this will fall on deaf ear because it seems like you don't care.