Your this old thread come to my reading now.
Mathadi Act is applicable to you. Please refer to entry 5 to Schedule under section 2(9) of Maharashtra Mathadi, Hamal and other Manual Workers (Regulation of Employment and Welfare) Act, 1969 which is given below verbatim.
"5. Employment in markets, and factories and other establishments, in connection with loading, unloading, stacking, weighing, measuring, filing, stitching, sorting, cleaning or such other work including work preparatory or incidental to such operations carried on by workers not covered by any other entries in this Schedule."
Please share with us your experience handling this issue up till now since past 6-7 months.