Could you please send me a PM (private message) with your Full Name, CID (customer identication number) and your mobile phone number, so I can take a look at your service?
Hopefully your speed change will be processed soon.
Looking at your connection history I can see your service has been up for around 1 day and 6 hours, so not seeing any dropout issue.
If you are experiencing dropouts on your end, it might be an issue with your Wi-Fi. Here is a guide that will help improve your Wi-Fi.