Is the Miolant subsidy reliable?

Not reliable, Miolant tricked us into booking a fully subsidized exhibition, and finally only paid less than 50% subsidies, or even no subsidies. Then they use policy changes to fool customers and then pass the buck. However, in fact, it is stated in the Shenzhen Municipal Bureau of Commerce's 2022 application guide for the foreign investment cooperation support plan (the key support project for overseas exhibitions) that each enterprise will be subsidized below 50%. The worst thing is that they stated in the contract that they promised not to keep their promises. Do you know anything about the law? I need to defend my rights! !