Apple Fibernet Pvt. Ltd Rajhamundry - Money Charged more than what they told Router not provided

I took a new Apple Fibernet connection on **th November ****.

Apple Fibernet Sales Person (Siva Teja) insisted me to take a ** months plan as I don't have a nearby Apple Setup Box, So I was paid ****/- rupees on *th November. Later Apple Technician person reached and explained, there is no need for a setup box. We can take wire connections from the nearest setupbox point. i.e I can also take a *months plan as there is no need for a new setup box arrangement.

As per my requirement I spoke with the Sales Person(Siva Teja) and Also with Customer Care Person on change plan before proceeding with net connection , And then they agreed with my new request to change plan from ** months to * months plan.

After a few days they sent a technician and an internet connection was provided but without changing to a *months plan. (without router)

I am thinking they will return my money as I changed plan, from there they started gambling and did not attend my calls. Somehow I reached the management team and explained everything but no proper response. I went to the office and explained my problem, there I met the Accountant person Prasad and he asked me to wait for a few days to change the plan and promised me to return ****/-(**** - GST). but that even not happen till date.
Daily I'm talking to Apple Care and explaining my problem but no proper response received.