Hey @Rashwans21 and welcome to the Community.
I understand why you are worried. Having data is important to most of us these days and forgetting to put WI-FI while using data can cost you.
We have a blog on our Community that gives you tips and tricks to stay on top of your data usage. You can find this here.
Also, our Pulse plans come with Data Bytes which give you 5 extra hours of data: 1 hour, 5 times a month. You can find all the information you need about this in our FAQs here.
If you need any assistance, don't hesitate to contact us through our contact channels.