Data expiry date

<p>I bought a 100gb data sim last year - expiry date 28/06/2017, which is today. It has already expired. Shouldn't it be at midnight tonight?</p> <p>Due to bad internet connection, I was unuble to use the 100gb by today. I still had about 27gb left - wasted, because I couldn't use it due to the fact that internet connection is so bad. I struggled to use what I have used up to 27/06/2017.</p> <p>I have contacted them last month to ask if they can perhaps extend the date, and told me to go to a Cell C shop. There I was told I can extend the date if I add more data. I added 200mb yesterday, but the 100gb still expired.</p> <p>I am sad because of the 27gb that I have lost.</p> <p>One thing is for sure - I will NEVER EVER buy data from Cell C again.</p>