Cancellation contracts , reimbur*****ts , credit score

MTN IS THE WORSE EVER !!!!!! Expose MTN South AfricaMTN Business South Africa ridiculous service !! I’ve took out a new contract with MTN and when I received the phones it was faulty , I took it back within the 7day period , they tell me the 7 days period doesn’t exist by them , I waited for a warranty assessment as the phones had been sent away , righto I get 2 brand new iPhone 13s again , the devices gave the same problem which my first phones did , took it back again and told them how can they give me faulty phones , so they sent it away AGAIN for warranty, comes back again and does the same thing !! Bare in mind I had the phones literally 2/3 days and they deducted a full 2 month payments !!! We went back and forth with MTN and asked them to rather cancel my contract as I cannot go back and forth anymore it’s frustrating and on top they deducting my money !! I asked for cancellation and up till today I cannot take out another contract with another MTN BRANCH because these **** mother ****ers played with my credit score !!! Please help how I can go about or move forward , I’ve been sending emails for 2 months straight to complaints and I’ve been phoning and nobody can assist me in this matter !!!!! The worse ever , disgusted in MTN South Africa and also I’m still waiting on them to reimburse me !!!! This so ridiculous and frustrating man !!