Ladbrokes complaint: Incorrect score shown before placing the bet

Hello, I placed a bet today on a football match based on the live score showed by Ladbrokes.
(which was 4-0). My bet was under 5.5 goals in the match and I placed the bet when it was 85th minute in the match.

When my bet was placed, the score was updated to 4-1 in the same second and consequently I lost the bet when the next goal was scored making the score to 5-1.

I would have never placed this bet if the correct score was displayed by Ladbrokes and this is not the first time this has happened. There have been 2 instances before as well when this has happened to me using their inline platform.
I contacted their customer support and told them the last time when this happened but they said that they can’t do anything about this and it’s the user’s liability not theirs.

I demand to be refund for my bet amount immediately, which is Euros 500.