Myflowerapp — Late delivery and asked for extra delivery charges.

I ordered the cake from myfloweapp in Punjab and already paid 200 for timely delivery between 1 PM to 2 PM, but they called me and asked me to pay an extra 200 for delivery, I even paid an extra 200 for delivery, but the cake reached at 5 PM and not even on the exact location. and when I opened the cake there was no name written on it as I clearly instruct them to write the name.
What is the use of paying 400 extra if they didn't deliver on time and in the exact place? This is just unfair.