Former property management company screws me on the last billing

[Mike A.]

As some may know, I've been having some issues with the previous property manager who managed my two 30 unit buildings in Connecticut. I just received the last month's billing (10 days late no less), and they put through several under 250.00 "charges" for cleaning supplies, which they stated as usual cleaning supplies, but's it's never been charged in the last 3+ years I've used them.  They also charged just under 250 for landscaping, even though there is no grass to be cut.  So basically, 247.97 for spraying weeds; even though this has never been done or requested before.  In addition, both buildings were slapped with fines due to garbage which the property management company not only failed to clean up, but failed to notify me.  I've since not been reimbursed here.  

In their other charges, they also claimed to replace additional lightbulbs at a cost of $91.62 each bulb.  These are regular 2.00 LED A19 bulbs.

Is there any recourse here?  I'd love to get an audit of the actual charges for the last 3+ years and see if there was any excessive overcharges or such. I am just concerned if there would be any fallout if my current new property management company finds out that I've sued my old one. 

Open to suggestions and ideas. I hate it when I am thought to be played like a fool. Interestingly enough, one of the evictions they did in August mysteriously went back to the original amount charged instead of the inflated charge earlier in the year.