Lawn Doctor

I have had Lawn Doctor for the past 3 years. However, I know it has been unusually hot. However, the lawn was serviced last month and I have a big patch of crab grass that is spreading. I don't think I will be renewing my contract again next year. There is a part of my yard that has not be serviced, and I was told because there are trees there. The first time I had your service the whole yard was done and it looked beautiful. The past two years one area by the trees has not been done. I have been watering faithfully because of the dry period. There is also an area on the side of my house with flagstone and there is crabgrass growing there. I thought that the whole area would be done... So I am very disappointed. I understand this has been a very hot summer, but I hired Lawn Doctor because I am unable to take care of my yard alone. Thanks for your help. Claire Delaney