HELP! Property taxes doubled on my duplex

[Timur Salikov]

I've been paying 2,500 a month for my duplex. Last month I went online to pay my mortgage and discovered the bill changed to 3,200. When I called the company and they informed me that there is a 4k shortfall in my escrow so they raised my monthly payment. Apparently my property taxes have doubled. Once my shortfall is to be paid off, my new monthly bill will be around 2700. How is this possible? Can this be contested?

So here is the timeline..

2015 - bought duplex for 455k with FHA

2016 - did shotgun refinance to lower my interest from 4 to 3.25

2017 - fins out I have shortfall and my monthly payment had increased.

Here is the LA county tax info: AIN: 5188-016-029