We also had terrible experience with blue haven (they were the only ones who came out to give us a quote so unfortunately we proceeded with them). We were told that one of their staff would project manage the whole thing . The excavator came out & didn't even know how deep to dig. We contacted Blue Haven & no one wanted to deal with it. Luckily my husband was home. He calculated it all & helped the excavator work things out.
We had to chase them to find out what's happening. They sent out material with things missing & We had to run back & forth to their store to pick up the missing material (otherwise it wouldn't have been completed anytime soon!)
At the end of the entire horrible process, it didn't get even council approval! The final product wasn't the same as the original plan. We ended up contracting another individual to fix it up for approval.
I would not recommend Blue Haven to anyone!