DISAPPOINTED IN CELL C

I have take a contract out November 2020, The 3th of February I call them to pay the handset off, they said I must pay R3445.43, because I just want the benefit, the data and the airtime, I paid the money send the proof of payment to 4 of February *** at 2:46, I call them did you get the proof of payment, no we did not get the proof of payment, they will do the migration, so I left it there. I told them fix my account now, yes we will do, the end of February I receive a Statement that they are take the monthly installment of R467.00 of the R3:445.43 that I paid for the handset. they said it is fix, I told them why do you deduct the money from the handset money, they said they will look in to it and they will call me back, they did not call back, I call them back, I said you record your message go back and listen to my message, yes they will do that and Come back to me but they did not come back to me, I call again, then this one say you cant just pay the handset you must cancell so you see they dont know what they are doing there, then I Call again then that one says we do migration just to pay of your handset and have the benefits, they will fix it and they will call me back, I did not receive a call from cell c, I have waisted allot of my time and enegy, I call them again, they said they did not receive proof of payment I send it again to ***; on the 9 of April 12:05, he said he will call me back, he did not call me back, I call again, they will look into it and call me back, no calls. On the 12 of May I call again, and I told them I want to speak to a Supervisor or Manager, I speak to her, and she said I must email the proof of payment again to her email and she will give it to Charmaine to call me back, I send the proof of payment to *** at 11:46, that Chairmaine did not call me back. So I call and ask to Cancel myu contract because I have paid it in full, So the cancel it. On the 26 of May they deduct R2723.66 of of my bank account, I ask the back to revise it for me, why must I pay that amount of money for there ***********'s, I receive a statement on the 2 of June from that that I should pay R3777.19 a R1000 more why, I am so disappointed in Cell C,