Greenbean: ...I believe they have breached their contract as I should be seen as an emergency customer for 2 reasons - 1. is I have a baby and the other being I have no hot water at all, section 6.3.2....
...Failing to turn up to arranged appointments and arriving several hours late must be a good enough reason for being in breach of contract too...
I said I would give a 2nd opinion on what your reasoned thoughts were on the Terms & Conditions. I agree that having a child under 3 makes you a "Vulnerable Customer". I am less certain whether "lukewarm heating or hot water" satisfies the "no heat or hot water" threshold necessary for a Vulnerable Customer to be eligible for Emergency response.
Subsequently you selected heating over hot-water, therefore you now have no hot water. I believe *probably* that creates an "Emergency" situation, except the delay is now parts availability. (BTW is the "no hot water" heating now "hot" or still "luke warm"?)
I'm puzzled at the reference to £178 + VAT. Are you saying that Eon are requiring you to pay £178 + VAT for the "flow assembly"? What reason have you been given?
I mainly give "practical" advice. In this instance you need to focus focus focus on getting heat and hot-water restored to your home. Given that you are troubled by the £178 you really need to let the current call-out run its course because any alternative will cost considerably more up-front with no guarantee of redress.
If you feel particularly aggrieved and want to pursue a court claim against Eon there is better legal advice on the forum if you change the subject to invite that response. But the wheels of justice will not speed up the current repair.
Again on a practical note (also for the benefit of others), a combi boiler can fail at any time, simultaneously depriving the household of both heat and hot-water. If it happens, particularly in severe cold weather, service organisation response is quite likely to be tardy. A couple of electric heaters are cheap to own (though not to run) and will keep a room or two warm(ish). Hot water is harder unless the home has an electric shower.
The point is the need to "be prepared" and a recognition that breakdown contracts do not "guarantee" restoration of service within a defined timeframe in all cirumstances. Whether that is "breach of contract" is not easy to answer and even harder to enforce. I recall reports of a boiler service organisation being successfully sued. I will seek out the link and edit in.