Was it any better before and just recently deteriorated? Or was it already bad even before?
If a telco's signal had not reached or is very weak in your area ever since, than the most practical thing to do is to get a telco which has the best signal otherwise your subscription would actually be useless.
Now if Globe's signal had just recently deteriorated then what you did by reporting it was the right thing to do. Depending on how improtant communcation is for you, you could either wait until your area improves or change to a telco which has a better signal.