What's there to look into? WAI or not, lots of people are unhappy. In the end, unless you reduce costs you're going to leave a lot of people upset.
Look at Blizzard and D3. There was a point they increased repair costs to a point a lot of people got upset. Was it a bug? No. What did Blizzard do? The lowered the repair costs.
They didn't do it in less than a week either, though. It took them 2 months. A whole patch.
Joveth can't hit any buttons to lower the cost for us, and looking at the past history of things going on in this game, the repairs could in fact be higher than they intended for reasons they weren't aware of.