I discovered from my brother and also other people using Streamyx 384Kbps that the speed was sufficient for normal browsing and casual download. So the decision is final, we wanted to downgrade the existing 1MBps Streamyx to 384Kbps. After making calls to 100, the best way to downgrade is to go to the nearest TM Point which is for me located at Kepong. Since the line was still under my father's name and my father passed away last December, I first had to transfer the account to my name first by filling up a form before I can apply for the downgrade (RM10 was charged for the account transfer).
TM Point Kepong design is quite nice and comfortable, as usual the queue required me to wait for almost half an hour before my number turned up.
Here's another view of TM Point Kepong.
The only thing that surprised me was that my internet line would be disconnected for 2 weeks in order for the downgrade to proceed. I then asked when will the line would be cut, the guy at the counter said immediately. So, I was out of internet for 2 weeks. I had to use alternative broadband internet I have which is the DiGi Internet Prepaid that I've bought a while ago but the reception in my house was really slow. I then tried using Daily Unlimited Celcom Xpax Prepaid Internet during last weekend, the speed was acceptable but the budget was a bit steep for me.
I made a call to 100 last week which the operator told me the downgrade request hasn't been processed yet. So yesterday I made another call where I got the same answer with an additional information that I can request for a rebate for the entire stretch of my downtime (that was nice to hear). Last night, when I got back from home, my internet Streamyx was restored. A total downtime of 15 days.
So there you go, that was my experience downgrading TM Net Internet Streamyx.