Contract ripoff

I renewed my contract with MTN in June 2020, and opted for a contract were I was promised to be allocated 80gig day and 80gb night data, ideally I was looking for an uncapped data contract but went with 80 gig to see how I go for the month at R299 pm.

July 2020 I was allocated 70gb instead of 80gb and I enquired why, no reason was provided to me.

R95 was deducted from my account.

August 2020 I was allocated 30 gb day and 50gb night data, I fumed and called their policy department and I was told that is the contract I signed up for...mind you the copy of the contract was never send to me.

R428 instead of R299 was deducted from my account.

Now when I want to cancel the contract I am told I must pay penalty fee of R1350.

I have never seen such day light ******* in my life, I curse the day I even contacted MTN to renew the contract.