Please any advice

What do I do 😔 my partner and babies dad off 4 years has had a gambling issues for years found out around 2 years into our relationship and I left and he promised he would never do it again and he did 3 times and then blocked himself from all the apps anyway 2 years on a have had a strange feeling he still Is and today in his van I found 3 betting slips two on same day in may and one for last week he got like 500 each time he hasn’t been paying council tax so I am now I don’t work and we don’t live a lavish lifestyle don’t pay rent doesn’t pay for his van or petrol and has a very good job what do I do I haven’t confronted him yet but do I stay again or? We haven’t got a great relationship anyway but this is because I know he isn’t honest and this confirms it