On my old vw i just downloaded the updates from the site and installed myself as it was put on a 2 year service plan and i wasn’t going there anywhere soon. I know it came with updates for the 3 years as the nav is extra and on the honda i got now it’s has garman sat nav, thnk it might be for 2 years so one the 3rd year what then.. but alot of the time i just use android auto and that didn’t come for free on the golf and personally i would not pay for extras, so i just use my phone in a vent mount.. You could just take the car to another mg dealer for service if they will do update for free and then your local one has lost out on that income.. Thats all i can suggest..or look and see if you can do it yourself, it would deffo put me off getting any of those cars from those makers though..