Upgrade option

Good evening. I need assistance please. I’ve tried online & telephonically but I can’t seem to get anywhere. All I need to know is if I can continue with my current package on a new upgrade as I’m due for one. I really don’t want to lose my 1GIG of data that I also get monthly which was offered to me on my previous upgrade. I tried with a consultant telephonically but I failed. Please advise. My contact number for my upgrade is ***. I was an iPhone 6s as one of the options.