Gardening contractor experience

I used to have a terrific gardener who came in once a week and did some garden maintenance with his crew. Unfortunately he became ill earlier this year and can't currently work. In his place he sent around a pair of idiots (not his usual crew) who took on his "round" and said they were giving him a portion of the payment.
I took them on thinking that Danny would come back later in the season (2016) but unfortunately he is still not well. In the meantime I have been watching the idiots whose idea of garden maintenance is mowing lawns and strimming (UK Strimmer is USA Line Trimmer, String Trimmer or Weed Eater) perfectly good plants out of existence while leaving weeds intact.
They use a leaf blower to blow leaves about a bit resulting in them being trapped behind planters, in flower beds and under our cars. This is also known as "sweeping dust under the rug".

They are completely hopeless and I am actively looking for new contractors - don't make any suggestions BTW as I'm in England. The last straw came when I found they had strimmed all our perennial sweet peas off the face of the earth. These have come up every year since we bought the house (16 years ago) and are beautiful in the springtime. Worst of all they strimmed my grounding cable connection the HF antenna to its copper grounding stake - as well as woodworking I am a ham radio operator and this cable is important.



I'm keeping them on for the fall leaves, banned their strimmer and once all the leaves are all down they are sacked.

THEY HAVE GOT TO GO!