Xiaomi India — missguided by xiaomi customer executive

Address:

New Delhi, Delhi, 110077

I submitted my redmi4 mobile phone to dwarka delhi HCL service centre on[protected], they said your phone will be repaired by tuesday.
On Tuesday I called them on [protected] but they didn't respond.
After that on Wednesday I called to your hotline service number [protected].one of your executive picked up the call he said tell me your service number after putting my call on hold for 5 minutes he said that your handset is ready please pick up from the service centre.
When I reached at service centre they said that parts are not available to service centre fir repairing they said as soon as possible they receive the parts they will repair my handset.
Now my complaint is why your executive miss guide me regarding my service or under repairing phone if it is not ready at service centre please resolve the issue.