If you think that they are so much that no normal pest control solution is gonna work then as last option you can call Municipality (Baladia). They will come with there pesticide and take care of your problem.
I am not sure if this service is free but I think its free. They are amazing with what they do.
Its better to send your family to someones place before they come coz they will even spray the home and will recommend you to close the doors for couple of hours. Every living thing inside the home will be dead in just few minutes. Even cocroches cant survive this potent gas mixture. Good Luck exterminating cocroches.

Peace.