Citibank Credit Card
Collection agency still calling when the acct is settled

Hi,

i have already informed the citibank people that i have settled the acct but still they call me asking for a payment i also infromed them that its been settled. but couldnt fina any resolution for the same. i mailed them but no response just got a mail back asking to call the cust service. then why mail services are active on their website.