Had (still have) a wasp nest that needed removing ...

Had (still have) a wasp nest that needed removing from the gutter of my house, I gave Able Group a try because they were highly rated and guaranteed a free revisit if the problem wasn't fixed.
They came round the same day, the engineer inspected the nest and said everything looked fine, there should be no complications.
After the spray the engineer said the wasps should disappear after 48 hours, maybe a bit longer because it was raining, but everything was fine and again, no complications so I happily signed the paperwork.

After 48 hours the wasps were still there, but I gave Able the benefit of the doubt and waited until 5 days after their visit to call them to book my free revisit. I was then told actually I need to wait 7 days before I become eligible for the free respray.
Today it has been 8 days since the spraying, and I rang Able again to book my free respray, I was told that because of the complications such as 'the rainy weather' (in England), and the nest being in a 'hard to reach area', the engineer had voided my guarantee on the paperwork I had signed. I had explained over the phone when I made the booking exactly where the wasp nest was, and was told it would not be a problem, and it was already raining before the engineers turned up so they should have made me aware before they started spraying.

I argued that I should have been made aware of the complications before I signed, and that when I asked the engineer if everything went fine, he should have told me, instead of just ticking a tiny box on a big form.
Able group refused to offer me a free respray or a refund, but did offer me an insulting 10% discount if I would like to book another spraying with them.