Unreliable Store

am frustrated with this store's bad service with false promises and lack of communication. so i was convinced to pay my first installment on the 6 February 2023 which covers march payment then i discovered that my account was debited on the 27 February 2023 meaning i payed my account twice. on the 28th i went there and they told me they don't have money i must come back on the 4th February ,sent an email to their head office they asked for my bank statement which i sent immediately on the 2nd March. the store called me on the 3rd they said i can come through with my bank statement , when i got there they said they cant refund me they have to contact the head office they said it will take them 3 days to process my payment.today it is the 7 March my money is not in my bank i had to call the Cape Town Office and guess what they told me "they only received the documents on the 6th March and the money will reflect in my bank after 7 Day" . now am in the corner i will have to borrow money to go to work and feed my kids. right now i feel disappointed and frustrated.