Unable to use keyboard or mouse please help!?

I have a touchscreen Acer Aspire i believe. Anyways, when purchasing the product the wireless keyboard/ mouse is connected to the machine through a usb disk. This usb disk broke (not in a way that it won't register on the computer but it literally snapped in half). So now im short a keyboard/ mouse. Does anyone know a way to fix this or to purchase a new one of these usbs. Please Help