it's better to communicate with the bus reclamation office.
why u have no bus receipt? because this is a service contract between u and and coach canada.
anyway, u can ask ur friends to attest your presence in the bus, but ur friends need to be in the bus also.
how do u know there is a video installation in the bus?
it's better to speak or call directly to manager, not to the clerks.
whether u can file against the coach canada depends on the terms of responsibility of service provider and client. but it's time consuming to file a plaint like this.
first, communicate with coach canada, then if possible, speak to customers' protection organisation, because this is a typical consommation contract.