Back Rent

I need a bit of help solving a rent problem. I live in a large building, managed by a management company. Every month I get an invoice for my rent. Since I moved in the invoices have been $400 less than what is stated on my lease. Every month I paid the amount stated on the invoice.

Well, today someone from the accounting dept gave me a call- apparently after 4 months they actually did some accounting a found the mistake. Now they want to pay an extra $1200 (4 months of incorrect invoices). Part of me wants to say a big F*ck You to them, since it was their error but of course there is that stubborn lease. Do I have an argument? And please no lectures! I came here for advice.

By 7andfive |