Hating our villa

Bit of a rant...
We moved on the weekend to Meadows 9. To start off the villa had some work that needed to be done to it before we moved in which the management agent said would be done. Both DH and I said "yeah right, bet it wont get done" in time for us moving in because we only found and signed the lease 1 week prior to moving in.
We picked up the keys Thursday night and the managing agent said "the house has been cleaned and some of the problems have been fixed". Sweet we thought. So we decided to take a trip over on Thursday night to bring a load of things we didn't want the removalists doing, turn on airconditioners and lock the doors. Anyway, got here and the place was filthy - no one had cleaned it. The problems (numerous problems) hadn't been fixed at all. We only had 1 set of keys to the front door, were told all the others were in the kitchen cupboards, which they werent so we couldn't lock back doors etc so no point leaving anything when people could still access it.

We called the contact at the agent and he was very surprised that the place hadn't been cleaned and there were no keys. We were moving Saturday. He did what he could to get the keys but didn't get them until Monday, when he dropped them off to the villa. In the meantime I had contacted the maintenance company twice to come out and fix the problems in the house. 1st phone call they said they would call me back and 2nd time they said they'd e-mail me a time when the person would be coming out to check on everything and work out how many men were needed to do the jobs. Still no email a week later.
When the agent came on Monday with the keys I showed him and again told him the place wasn't cleaned. He showed me his e-mails to the maintenance company - there were quite a few from the day we dropped off a deposit to him. He then rang the maintenance company whilst here and basically yelled at them told them to come right away. That was Monday and we are still waiting.
Since then a few more issues have come up, especially with the aircon - it stinks and my sons room blows hot hair. We then went out today for 3 hrs and came home to the house smelling of sewage, it is freaking awful and I just want to cry.
I wrote a big email to the management agent to say that if the maintenance people are not here by this Sunday then I am calling someone I know that will fix it all, and quickly! and will be sending them the bill to pass onto the landlord.

We have guests arriving from Australia in 2 weeks time and currently the guest bathroom has no water heater because it has burst (in the ceiling) and has leaked everywhere (problem before we moved in).

I am just really really really really hating this house :(

Do you think I should get the people I know that would fix the problems ASAP and then send the bill to the agent? Is there anything I can do about reporting the current maintenance company?