YOU SAID:

We haven't even paid the phone bill in 300 years

INTO JAPANESE

300年間電話代さえ払っていません

BACK INTO ENGLISH

I haven't even paid my phone bill for 300 years.

INTO JAPANESE

私は300年間も電話代を払っていません。

BACK INTO ENGLISH

I haven't paid a phone bill in 300 years.

INTO JAPANESE

私は300年間電話料金を払っていません。

BACK INTO ENGLISH

I haven't paid a phone bill in 300 years.