Tempo LLC Why Not Lease It Stolen Money Manchester New Hampshire

I financed something with the company Why Not Lease It, also known as Tempo.  I have made my payments, they are deducted from my checking account via my debit card.  This is not the issue at all, this company is exactly what I expected it to be as far as financing an item, the problem came from me noticing a several extra deductions from my bank account in the amount of over $600.00.  When I called to see what the problem is I was given the run around stating that they did not see where these funds were appiled to my account, so I then asked where could they have been appiled; the first customer rep I spoke with had no clue and was unwilling to help me figure it out.  I then called back the same day to speak with another agent named Calvin, he ran a trace on my credit card number and found that since the beginning of April (2016) my card had been added to another individual's account and they had been deducting her payments from my account.  Calvin then told me that he would call me the next day to let me know how my card was added to this other individual's account. I waited until 4:30 and he had still not called with this information, I called there asking to speak with Calvin, at first I was told he was on another call, so I asked to speak to a supervisor, then all of the suddden Calvin was available.  When I spoke with him, he was short and rude, told me he had to review the call between the agent and this other individual that my card was being used to pay for her account before he could request my stolen money be returned to my account. He told me I had to give him 48 hours to do this, I asked again to speak to a supervisor because this was unaccpetable in my opinion, they didn't wait 48 hours to receive the money from my account I want my stolen money returned to me at once. He told me that if I was going to continue to get angry and short with him then he would not help me that he didn't have to, I asked him then who would be working on getting my money refunded to me, he didn't have an answer. 

This is theft, and I should not have to wait to have my money retunred to me bceause someone in their company made a mistake and added my card to this other individual's account. There are probably other legal names for what this comapny has/is doing to me.