Touchscreen troubles
yes - you should head back to the vendor that performed the repair as soon as practical and ask them to have a look at the device - assist with calibration and or perform the repair again if it's not working.

Most locales have a short period where any work is warranted, so be sure to get something in writing from the vendor if they tell you they can't support their work.

Hopefully it will be something they have seen before and know how to remedy and/or reach an agreement that is satisfactory to you both.