I can’t seem to figure out the problem with this car, after a few brake presses it goes really hard but then regains normal function, I’ve changed the brake servo, master cylinder, vacuum pump, one way valve and a full brake fluid change, just wondering if anyone has any ideas. Thank you

I hope you can help me find my vehicle's problem. What happens to it is that, when exceeding 60 mph, the abs and indicator turns on, the hand brake light blinks and the speedometer stops working. Even with the indicators on, everything works properly, including the steering and brakes luckily. When I turn the engine off and start it again, they are not there any longer. I've been told to take the car to the agency for it to be scanned, but I wanted to know if this has ever happened to anyone before and can give me a hand. Hope you do, and thank you.

Jai la lampe temoin de l'ABS qui est allumé ainsi que le témoin frein a main
Je nai plus d'ABS et les aiguilles de mes cadrans , a part le compte tours, ne fonctionnent plus. Les kilomètres ne se marquent plus.
Le temoin de la direction assistée est allumé. La direction est un peu plus dure.
Ma radio s'est coupée tout d'un coup. Je ne sais plus l'allumer.
On ne sait entrer un ordinateur, pour regarder les problèmes... il ne sont pas reconnus du tout. Que faire ?

Lampe abs reste allumée. Et plus d' abs. Lampe de la direction assistée reste allumée.
Plus de radio. On dirait qu'elle s'est mise en sécurité.

I just bought a used seat ibiza with 138,000 miles
And the only problem i had is that when i park in a hill i put the hand brake all the way up and the car is still rolling the only way for it to stop i have to put it in gear also when i get in/out of the car again in a hill the brakes make a weird noise does anyone know what the problem is ?