Freecharge Payment Technologies / Freecharge.in — annoying me by sending verification code repeatedly

Sir
Freechage is sendind verification code daily approx 30-35 times for no reason. I am not maintaining my account with them. Requested them earlier to unlist my number from their database around 15 days ago. They said at that time needful has done. But still the condition is same. For their nonsense messages my inbox is almost full and many times i am also unable to get any important message. You can understand sir that i am unable to block this type of message from freecharge it is only them who can stop these all. Looking forward for a quicker action from them