Lenovo — Lenovo K900 charging cable problem

Address:

Gurgaon, Haryana

Hi, I'm going crazy with the charger send by lenovo with my K900. I found in the box a power supply with a Micro USB cable type B but the input of the phone is type A. This causes problems of charging the phone. Why lenovo sends cables of type micro usb B if the phone requires cables tipe A? What kind of cable should I buy exactly to charge the battery correctly? Micro USB type A? Micro USB type OTG? Or what? Lenovo can provide the correct cable? Or where I can find it? Waiting for positive response from lenovo...