Best delivery service

I've been with MrD for a long time.what I like most about them is that there is always special under their app like buy one get one free,20%off ,30%off eve 50 especially Mondays and weekends.therr is a certain restaurant I like under their app,I once had a problem with a restaurant and I reported to MrD and they responded quickly and resolve the problem.i always choose them because they deliver fast .thank you