Don't buy cheap media. The burn quality is very often very poor & the longevity is questionable.
Verbatim & Taiyo Yuden media , both CD & DVD , is recommended for very good reasons. They burn well & last.
As for extracting data then ISOBuster is worth a try but it's often more about the DVD-ROM or burner being able to read these error prone disks. Liteon drives have , historically , been good readers but it often pays to have a variety of burners as the reading characteristics vary. Well that's one of these reasons I use to justify my collection.