Verizon Mobile voice mail ring changes no longer supported

I wanted to change the ring count before my iPhone went to voicemail, but was informed by 611 phone support that changes to the standard setting (6 rings) were no longer supported "in any market".  I know that Verizon has been making it more difficult over the years to change the ring count, but a complete removal of this changeability is ridiculous and not at all user-friendly.  Who do I have to complain to in order to get this limitation changed?

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