Could you please check my essay?

Although he is a definitely difficult and demanding customer - he has contacted even US Customer Assistance team dozens of times via phone and email over the last two years for various issues, sometimes for valid reasons and sometimes for difficult issues such as cash reimbursement for not using his vehicle due to the repairs - we will proactively react to his request and resolve the problems by closely working together with NA warranty team since this car is covered under the US domestic warranty. We need to get an approval from the US Warranty team for heavy repairs like engine replacement or warranty extension. Regarding his complaint about our delayed response to his worldwide warranty request, the fundamental issue was warrantability. He had expected all his problems to be covered under warranty, but our reply has not been fully satisfactory to his requests from his perspective.

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Although he is a definitely difficult and demanding customer - he has contacted even US Customer Assistance team dozens of times via phone and email over the last two years for various issues, sometimes for valid reasons and sometimes for difficult issues such as cash reimbursement for not using his vehicle due to the repairs - we will proactively react to his request and resolve the problems by closely working together with NA warranty team since this car is covered under the US domestic warranty.

>> Correct!

OR>> Although he is a definitely difficult to handle and demanding customer, he has contacted even the US Customer Assistance team dozens of times via phone and email over the last two years to raise various issues, sometimes for valid reasons and sometimes for difficult issues such as cash reimbursement for not using his vehicle due to the repairs, we will pro-actively react to his request and resolve the problems by closely working together with NA warranty team since this car is covered under the US domestic warranty.

We need to get an approval from the US Warranty team for heavy repairs like engine replacement or warranty extension.

>>Correct!
Regarding his complaint about our delayed response to his worldwide warranty request, the fundamental issue was warrantability.

>>Correct!

He had expected all his problems to be covered under warranty, but our reply has not been fully satisfactory to his requests from his perspective.

>>Correct!