Very Bad Customer Service Experience

I'm an existing customer to Capfin and decided to take out another loan. I did an online application and the amount I have requested was not was the loan agreement gave me. The funds was paid out within 10 mins. I called in to explain that what I had asked was not what was given and I could not afford the repayments on that loan (existing and new). I asked the agent what options I have available and she told me that they cannot reverse the payment and if I was to pay it back, it will be paid back with interest. I have logged a complaint with Capfin and received an e-mail from Abigail Williams stating that they will work on my query. Abigail had phoned me to represent my case and after explaining the situation, they have forwarded my case to the legal team. As I have known from the start, my account went into arrears. I received calls from the Collections team to say that my account is in arrears and that I need to make payment. I have told them that my account is pending with the legal dept and I'm waiting on feedback. Up till now I have still not received an feedback, my account is further in arrears and I'm being bombard with calls during work time when I specified call times.