VERY UPSET

I HAVE BEEN WITH CELL C FOR MORE THAN 10 YEARS AND BEEN LOYAL BUT I AM VERY DISSPOINTED WITH THE SERVICE I RECEIVED AND ALSO LIES THAT CELLC SEE HAS PROMISED . I TOOK A DATA CONTRACT IN MAY 2020 AND I WAS ASSURED THAT I WILL BE ABLE TO CANCEL IT AT ANY TIME AS LONG AS I GIVE THEM 30 DAYS NOTICE BUT NOW I AM GETTING A DIFFERENT STORY WHEN I REQUESTED TO CANCEL IN FEBRUARY THAT I HAVE TO PAY A PANALTY OR ONLY CENCEL AT THE END OF MAY WHICH WAS NOT THE AGREEMENT WHEN THIS CONTRACT STARTED. THEN ONE OF THE AGENTS CALLED ME TO OFFER ME AN UPGRADE THEN I CHANGED MY MIND AND ACCEPTED TO UPGRADE THEN TO MY SURPRISE ANOTHER AGENT CALLED ME TO OFFER ME ANOTHER UPGRADE BUT I SAID TO HIM I HAVE DONE THAT ALREADY BUT HE SAID TO ME THERE WAS NO UPGRADE DONE INSTEAD ANOTHER LINE HAS BEEN OPEN WHICH IS A SERIOUS ISSUE FOR ME AS I CAN NOT AFFORD A 4TH LINE, I WAS MISLED AND TAKEN FOR A RIDE AS I CAN NOT AFFORD ANOTHER LINE , NOT INFORMED THAT THEY WERE ADDIND ANOTHER LINE. I SENT AN EMAIL TO MR STEVENSON ON THE 6TH BUT UP TO TODAY I HAVE NOT RECEIVED ANY FEEDBACK