chestnut you appear to have a ceramic hob - not an Induction one (which is why your saucepans did not need replacing). Ceramic hobs are not as fast nor as safe as induction ones. Uses a different way of heating.
I cooked with gas all my life. Moved into a flat when I was 78 years old with a ceramic hob and when cleaning it all up discovered the sealed off gas pipes underneath. For a few minutes I seriously considered having gas re=installed, then thought better of it. Used that cermic hob for two years, slower to heat saucepans, but learned to turn off before finished cooking. Easy to keep clean. When I had kitchen re-done, changed that for Induction hob and would never now have anything else. So quick, so clean, so safe.
Someone on here mentioned a cover for such hobs (to help prevent damage from dropping thing on it - it is after all toughened glass). I purchased something, which looks good, and is supposed to stay in place when in use, but I cannot see the circles or controls through it, so cannot use it all. Has anyone got one that tays in use but does show all the controls?