Uniconnect — Not a reliable service

I bought 2 SIM and 3 recharge vouchers from India to be used in London. One recharge voucher just didn't work, no customer service help, and the internet didn't work. Upon return the executive in India who sold the cards to me (and who was contacted while i was in Lomdon) now asks for the evidence to refund the money. Horrible service, please do not fall in the trap o[censored]niconnect International SIM cards.