Can you get in touch with an experienced bass player in your area?
There is definitely something wrong with your bass and you need help to find out what it is.
Some information about bridges:
If you look at a bass bridge from its side, you should notice there's a right angle between the feet and back of the bridge; the side toward the tailpiece.
A quick drawing:
View attachment 7138548
If the right angle is toward the fingerboard, then the bridge is mounted the wrong way, and this may explain the fact it snapped two times.
If the bridge has no right angle at all, then you need a new bridge.
Hope this helps!