Complex sentence: However, local councils found that the cost of supplying water to these taps was eating up a large part of their budget, but when they failed to pay their bills the National Water Supply Company of Cameroun (SNEC) simply disconnected the supply.
Split into simpler sentences: However, local councils found that the cost of supplying water to these taps was eating up a large part of their budget. When they failed to pay their bills the National Water Supply Company of Cameroun (SNEC) simply disconnected the supply.