Repair a ripped touchscreen cable
The only way of really ghetto-fixing FFCs like this that I've found successful is to cut the cable where it ripped (straight across so you have an even end), and then scraping away at the insulation of the end that is to be inserted into the female mating connector. In order to get the FFC into the connector, sometimes it is necessary to reinforce the cable end by inserting it along with some thin plastic, or applying some tape to the back (to make it a bit thicker to have a firm fit inside the connector).

Keep in mind, this assumes you have enough (lengthwise) of the FFC remaining after the cut to work with. If you don't, you'll need a new FFC/display panel.

(FFC = Flat Flexible Cable)