Taking advantage of an older woman. Denying cancellation and failed service delivery.

Just moved from durban to nelspruit. Sub letting from an old ladies house WHO HAS SINCE OCTOBER complained that her wifi disconnects mutiple times throughout the day. EVERY single day. I thought it odd and left it since brother works in IT. Come to realise this is ACTUALLY the case. She has logged complaints. Been told BS stories. There has been no efforts beside bot responses and empty promises. It is DISPICABLE that you will debit an old lady every month since last year October and do NOTHING to fix the issue. Makes me f**king sick! Money hungry I say. I dont review and try be nice and calm but taking advantage to this extent is gross. I have been struggling with the wifi for 2 months since I moved. I have hit boiling point and now become rude through aggrivation. End of this month your router will be in the trash and I am personally helping her with a new ISP. Last month was said she can cancel end of april. Now its being said that its end of July but its been a month to month contract. Are you trying to take advantage and make stupid an woman of 73 yrs. I have observed silently from the sideline...She is going to cancel this month and put notice last already. Deny it and I will take all her evidence from October and failed service delivery and SUE YOU MYSELF for EVERY SINGLE THING my lawyers can pull from the book for your ********* money chasing business roles. Because its become a financial implication to me too now.