State Bank Of India [SBI] — threat to come home and collect money. even though bill is paid earlier. misbehaved on phone.

Address:

smart car wash, kudasan, Gandhinagar, Gujarat, 382428

Dear sir/madam,
I am very disappointed by the calls from mr. Kedar raval, who call himself as a recovery agent from sbi credit card. He calls me for the payment of credit card suddenly without any proof that he is from sbi and asks me to pay my bills. I have already paid the bills two days back!!
He tells me to whatsapp me without any sort of proof. How will i come to know that he is genuine person. So i got angry and asked him proof so he said he has my address and he can come and collect the money from my home.
I am a salary account holder in sbi and i work in ipr..
As i told him that i have recordings of his calls he is asking me to do the complain.
This is not expected from sbi!!
I am very very dissapointed by his behaviour with me.
He is recovery agent or whomsoever he is at least he has to check or confirm before calling anybody for the same.
He is misbehaving with me on phone,,, gundagardi hai kya??!!
Has sbi started to keep goons to recover money or what??
I took a credit card for my feasibility, not for the harassment.
I agree and it is my duty to pay my bills, somehow delayed due to personal reason, but now why is he calling after i paid bill and arguing and misbehaving?
Very very disappointing!!