Stop buying Seagate drives if you have any influence in the matter. They are notoriously unreliable in my experience, and your own experience bears that out.
Choose Western Digital, Samsung or Hitachi.
The reason you appear to be "locked in" to Seagate drives is probably due to the fact that your company is returning the faulty ones to Seagate for replacement. Somehow you have to persuade your boss to get a different brand.