Shocking customer service. After years of using Google Ads, and spending millions of GBP in that time, Google suddenly cancelled our conversions. There was no warning about this, yet they continued to charge for useless advertising for months. I noticed that something was wrong after a few weeks, and asked our Google representative to see why conversions had dropped off a cliff. They couldn't find anything wrong. Two months later I found that Google had just stopped all the conversions, meaning we had been paying for advertising yet receiving no customers. If I hadn't noticed this, we would still be paying for pointless advertising now.
They refused to offer any kind of compensation because "we couldn't work out why we cancelled your conversions". It doesn't matter why, it matters that you did.
Beware of Google Ads and take your business to Bing.