Just got my "Shinny new 4g SIM card" and thought oh I'll do a quick speed test 😃 On 3G I am getting 1.2mb download speed acceptable, on 4G sitting in the same chair still with 3 bars of signal 0.02mb download speed! Vast improvement not! I hope this doesn't continue in other locations.
I'm sorry to hear about the issue with your data connection. I'd like to take a closer look at your account and see if I can shed some light on this for you. I've sent you a private message which you can view by clicking on the envelope in the top right.