@vanjmai -- welcome to this peer-to-peer discussion forum, where volunteers try to help.
Could your issue be similar to another thread on this forum:
https://support.shaw.ca/t5/internet-discussions/edmonton-southside-hodgson-area-internet-keeps-disco...
?
If not, contact Shaw/Rogers Support ( 1-888-472-2222 or www.shaw.ca/chat ) to get assistance.
Is your cable-modem overheating (in a closed-in space) ?