Middle of touch screen is not working

@navaidalamsyed sounds like you have a failed touch screen. It is fused with the rest of your display assembly. I would suggest that you replace it and while you do so, check the connector for any bend or broken pins etc.

Since iFixit does not yet have a guide for this, use the one from here Displays are available at plenty of online stores, just make sure that you get one for your version of the A30s

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.