Not getting what I paid for!

I've done a contract upgrade in December 2023. The package was 100G anytime data, and 100G night data. Option to use data share was available Issues - Since the upgrade the contractual 100G has not been delivered, it's 11G short The 2 contacts that are sharing data cannot use the data. I'm being billed correctly every month but not getting what I sighed up for. So I call the call center and after getting pushed around, either the call drops or nobody can explain why I'm experiencing the above issues. I visit the branch and I was told that since I took the upgrade with the call center, I'll need to go back to them. They could not cancel either. I need help in either getting my full data, or canceling the contract. Please contact me