Don't hesitate to call me if you face any issues or have problems with/on the chapters I gave lessons on.
Is that sentence grammatically correct, considering any one preposition between with or on.
Also in how many ways can I ask someone if he has any issues facing trouble or having problems.
Please state some of them I badly need them thank you.
Don't hesitate to call me if you don't understand something in the lessons. Don't hesitate to call me if you are having difficulties doing the homework I assigned. Don't hesitate to call me if you have problems with any of the material we covered in Chapters 10 and 11.
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Don't hesitate to call me if you don't understand something in the lessons.
Don't hesitate to call me if you are having difficulties doing the homework I assigned.
Don't hesitate to call me if you have problems with any of the material we covered in Chapters 10 and 11.
"face any issues" is completely unnatural in that context.