You have not given any information to allow people on this group to help
you. We don't even know if the check engine light is on.
I can only guess that someone sold you an oxygen sensor, but that did not
solve your problem (it rarely does).
If you want assistance from this group, take a deep breath and gather some
information: what codes were stored in your computer, which of the sensors
you replaced and why, engine size, mileage, any other symptoms, any previous
repairs that you attempted, etc. Have it re-scanned by someone like autozone
(but don't buy anything they suggest) if you don't have the original codes.