Unable to unpin an app on my Lenovo tab I am using a Lenovo tab, it is pinned with Ola play app. I tried many times to unpin it by pressing back, multitasking at a time. It is showing unpinned. Again it is automatically pinning to the same app immediately. I am also unable to access Settings > Safe Mode option also.

Please tell me a solution other than factory reset option.
Try to perform a soft reset by holding the power and volume down button until the screen goes blank. If it has a removable battery, take it out and then put it back in. If neither of the above work, google soft reset lenovo tab (model)