Had a terrible experience lately with Travel start online booking

Had a terrible experience lately with Travel start online booking.

I booked flights online for a trip. It was a two way trip of which after paying online, I received an email the next day stating that one of the transactions did not go through. I was worried because it does not make sense that one transaction will go through and not the other.

Now I was made to pay a higher amount to re book a new flight, which I did because my trip was urgent. However, immediately after the new payment was made I noticed that both the previous amount and new amount were deducted from my account.

I called the call centre they assured me that I will get my refund in 7 to 10 working days. Till now (almost a month ago) I am yet to get my refund. They keep telling me that they have sent the money for reversal processing I should wait for another 7 to 10 working days. I am highly disappointed in the whole situation.