you don't say whether you are referring to a phone contract or just a SIM only plan.
Contact customer services about this on 789 from your Virgin mobile or 0345 6000 789 from any other phone.
Alternatively to speak with the cancelation team directly call 0800 183 1150 open Mon-Fri 8am-8pm, Sat 9am-5pm, Sunday Closed.
You will need to give a notice of cancellation.
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