Please help me deactivate and activate Studio 2019 Freelance!

My old laptop is on its last legs, so I've had to buy a new one. I have Extra Activation, but Studio won't let me use it on my new machine. It also won't let me deactivate my licence on my old machine - either online or offline. I can see that a lot of people are having the same issue. I've tested my internet connection: it passed the test with flying colours. I have spent all day trying to wade through the mass of information online (provided by RWS) but nothing works. I really need help :(.

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