Mortgage is serviced by Seneca Mortgage Servicing LLC. Received letter dated XXXX/XXXX/16 requesting additional {$1000.00} in payment on top of the {$660.00} standard monthly payment that had been received ( noted in letter ). No explanation for additional {$1000.00} charge. Online account still noted {$660.00} as the required payment amount. 

Sent email to customer solutions day received letter, XXXX/XXXX/16, after being unable to contact a representative through customer service number in letter and available online. 
