How to troubleshoot a faulty transmission in a Vauxhall Crossland?

I have been experiencing issues with my Vauxhall Crossland's transmission lately. It has been shifting gears erratically and making strange noises. What could be causing this and how can I fix it?

First, check the transmission fluid level and color. If it is low or has a burnt smell, it may need to be changed. Also, check for any leaks in the transmission system.

If the fluid level and color are fine, it could be a faulty solenoid or shifter cable. Have a mechanic inspect and replace any damaged components.

Another possible cause could be a failing torque converter. This will need to be replaced by a professional as it is a complex and delicate component.