Getting EMI calls without even taking the service. Please help

Hello everyone, I(22M) am new new to this Loan and EMI thing. On first week of January 2025 my dad and my elder brother went to a wellness clinic [VLCC](https://vlcc.com/clinics/beauty-wellness-clinic-mumbai-goregaon-malad-2/56) at Malad, Mumbai for my dad's weight loss treatment(90+ kgs). They just went for the purpose of understanding the process, treatments, plans etc. but the manager lady while consulting kept on saying that you can take the weight loss plan now and initiate anytime you like, to which my brother agreed and she without even letting my brother and dad know initiated a loan of 1lakh INR zero down payment with the EMI 8K monthly from [FIBE](https://www.fibe.in/), she took the photos of PAN, Aadhar Card, Bank details etc. After coming home, my dad decided not to take the treatment now as it was way more expensive and we have some more pending loans to pay for, also he thought it would be better if he do it by himself going to the gym and we just never thought about that treatment ever again. But from the 1st February 2025 my dad is receiving multiple spam calls every single day regarding the EMI and when we went to clinic, she is saying you have to pay the loan regardless of you take the service or not, we have already got our money from Fibe, now you have deal with the loan. I don't know what to do now, I went to SBI office today with my father and the SBI manager said that they can't automatically deduct the money by themselves unless you pay them but If you don't pay the loan, your dad's CIBIL would be effected very bad, he suggested me to complaint on RBI office through mail, maybe that can affect something. Guys please suggest me what should I do.