You may wish to contact compliance and inform them that they are violating legal requirements in the UK (assuming that this is, y'know...true). Without blustering or yelling (getting angry makes you look less credible), simply state the government agency that accepts complaints, and state that you will file a complaint if the matter is not resolved. If there are laws that mandate how fast Google is required to resolve the issue, it is worth mentioning them.

In general, support has the incentive of making tickets go away. Compliance has the incentive of making sure the company doesn't run afoul of regulators. Compliance is also much much more powerful at an organizational level.