Your best option is to call in at 08.00 for least wait times.
If you have problems then - try options 1,1,4,4, "thinking of leaving" they usually pick those up quite quickly as they want to talk you out of it ! Say you want to cancel because of these issue and then wing it from there
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.