Century Packers and Movers — Household shifting - Bangalore to Mumbai

Address:	Sector no B-55, 1ST FLOOR, DDUTTL Industrial suburb, Yeshwanthpur bangalore 560022
Website:	www.centurypackersmovers.in/packers-and-movers-bangalore.html

I have booked this company to shift my 1 BHK home things from bangalore to mumbai. Their person came and gave a bill for 22, 200. Then they told to pay 1, 200 as advance booking charges. I paid. Today they packed all the things which includes Queen size bed, TV, Tables, showcase, chair, all clothes, Two-wheeler bike, Wooden cupboard, kitchen utensils, and other valuables, in that a file is also their with all my degree and certificates and important documents. Now they sent me bill of 26, 196 with 18% GST and asking me to pay the amount now itself then only they will deliver my goods. How can i pay this amount in advance and with such type of behavior how can i be sure that they will deliver the things after making payment and they will not ask for more.
Please support me, i cannot visit to bangalore so only i booked this due to emrgency and now they are behaving like this. please help .please