I have and it worked pretty quickly for me - but some people get no responses !
Are you still trying to get through and order them. If so be aware that they are only "free" on the full house/maxit packages (or above) - otherwise they will charge you £3/mo. - and you would be far better served using those monies to get your own better quality solution or wireless equipment to sort your issue.
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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.