the wonders of offshore - theres a few posts on here with similar stories
you can write - but why should you have to when the process should be simple - if you do its the Sunderland address
try this and dont go any further if you are not speaking to a UK agent - even then some have made leaving difficult
dial 150 or 0345 454 1111 and follow the prompts to - 'thinking of leaving us' - open 8am -10pm 7 days a week - should take you to a UK call centre
i will flag the thread to VM - they cannot normally deal with cancellations on the board but they should [at last] be able to confirm what changes - if any - have been made to your account
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Tony