no truth in Cell C

i am now tired of Cell C, i have asked that you deduct my debit order monthly on the 20th and back in 2006 i had informed you that doesn't matter when the 20th is i get paid on the 20th, for the past 10+ you have been doing the right thing, comes 2022 you decided to debit me the 19th, then you tell me about public holidays, where do you get the right to charge me R70 and where do you get the right to change my debit order date? in February you said I'm in the shortlist for the iPhone 13 mini for my upgrade, its mid April now still haven't heard anything and you have sent me a new contract that will resume 12 May on what device, please explain to me.