After ***** in my account now upgrading fees that i have been charged

I upgraded 2 of my lines in July 2018 just after that i had been de*****ed 3 more lines which was a struggle to remove and after all that no courtesy call i was given neither to tell me what happened and how MTN will make sure this wont happen in future. Again last week i receive my invoice on ********** 021 i have been charged upgrading fees the system shows that i upgraded on the 05 Nov 2018, how do i upgrade same number twice in few months in one year. I am so sick and tired of MTN and I have been sending word of mouth to my colleagues and friends stay away from MTN.