HTC India — bad attitude and customer relationship

Address:	691008
Website:	HTC Service Centre Locator

On 01.09.2018 I'd ordered for a new HTC One X9, battery for which the full payment was made through the Federal Bank within 30 minutes of the conversation. Later on Monday, I called for about 7 times on the number which has displayed on the website as well as the one who gave the account details for the ready payment. He not only picked the phone but several times he had purposefully disconnected the call and the 8th time the call was diverted to some number which was told to be the landline number of the service center.
Is that the right way to respond to a customer who had trusted the service center and made the full payment as soon as possible for ordering the new part.
On 03.09.2018 the product was not delivered as well as changed as they mentioned that wrong product was delivered if he had picked up the phone and heard what I had to say I wouldn't have wasted the time spend for that journey.
On 04.09.2018 I got a call around 3 pm intimating that the product has been reached.
On 05.09.2018 when I reached they had changed the battery with the new one, but they had failed to provide me the bill. Some lame excuses were told and finally concluded that they will mail me.
Not at all satisfied with the customer relationship and how they communicate and behave with the customer.

I will rank with 1.5/5 for this Customer Service Centre. Not only the landline number and the address of the location provided are entirely different. Even though they are using a new landline as well as the new location for the past two months they had failed to update those details in the official HTC website till now.
Please note to include the contact numbers of those persons who are responsible and liable for registering complaints.

The customer service center is Qubefix, Kadappakkada, Kollam.
An amount of 2400 was paid for HTC One X9 battery, even though they told 3 months to guarantee they didn't provide me with a guarantee card, bill or anything that mentions about the cash payment and guarantee only a service job sheet was provided.