Vodacom fibre internet

Vodacom fibre internet the worst every night or morning the connection is offline then we can't do anything we losing work around 22:30 or 2:00am the internet goes off then restored at 8am or 9am in the morning this Vodacom is busy breaching there contract the day we signed up it was told we never going to be offline we payed full month but every night we off this is unacceptable