YOU SAID:

we have been trying to reach you regarding your cars extended warranty for quite some time now

INTO JAPANESE

私たちはあなたの車の延長保証に関してかなり長い間あなたに連絡しようとしてきました

BACK INTO ENGLISH

We have been trying to contact you for quite some time regarding the extended warranty of your car

INTO JAPANESE

私たちはあなたの車の延長保証に関してかなり長い間あなたに連絡しようとしてきました

BACK INTO ENGLISH

We have been trying to contact you for quite some time regarding the extended warranty of your car