DishTV — From last few week ,some of the channel are not coming message showing

From last few week, some of the channel are not coming message showing, "due to heavy rain unable to display the channel ", even there is no rainfall and atmosphere us clear .When I complaint to dishtv they are not supporting to resolve the same, they know that there is some alignment problem and asking to send the technician which will charge 175 for visit, if there is some alignement problem it can be resolve on the call why should I pay 175 rupee for just a small problem, I am not stasified with the services dishtv is providing and I want my security back and want to disconnect the DISHTv connection,