Thanks for all replies.
The project involved replacing soffits and fascias. The company replaced the old wood stuff with pvc. For all we knew they have done the job well. However, it became apparent that the way the fascia boards were mounted was too high which kicked up the pitch of tiles in the last row. The company also "installed" eaves trays but they never fixed them properly, nevermind making sure they overlapped by 150mm.
All these was discovered when we started getting rain in the soffits and water dripping on a bedroom window! When it happened first time, the company came back and "fixed" the issue (looking retrospectively and with a bit more knowledge, I think they basically did nothing to even try to understand what the problem was).
The problem reappeared the following year, so w decided to hire a roofer to have a look and he confirmed the fascia boards were installed too high which would cause the water to drip down back to soffits.
Now, the company wants to sort it out for us. But my question is, is it going to be an easy job to either cut down existing pvc fascia board or will it need to be taken down.
Perhaps we should get in someone more professional who can sort it once and for all.