Lewis stores

I purchased my furniture at Lewis stores in Chris Hani Mall in 2018, I made my first directly in store then decided to do debit order, in November 2020 I went in the store to cancel my debit order for them to debit in my new bank account the two ladies who assisted me said the head office is not responding I left my details they said it will take a week to cancel until today I have a minus outstanding in that bank. From four different people that called me in the store that I complained to none of them has fixed my matter. I have an outstanding with them and the bank now. Lewis is a **** the credit has never went down, they don't take their customers serious, I just need them to sort my bank outstanding and I'll sort their outstanding also