Welcome to the Community @Lindaloftus,
There are many factors outside of our control that affect the services, such as but not limited to; the performance of third-party suppliers and equipment and force majeure events.
Also, network maintenance are done from time to time to ensure continued performance on the network. Where possible, these works are performed during non-peak times. However, sometimes due to occupational health & safety constraints and sometimes depending on the urgency, works need to be performed during the day.
Hope this helps.
Regards,
