Very poor after sale service

So I purchased a phantom 4 pro drone with allot of extras. Including an extra battery and a nd 4 filter. Everything arrived a few days later and all was well. Except for the fact that the incorrect filter was supp****, and the original battery would not hold a charge. I contacted droneworld and their repair guy Mike, arranged for the faulty/incorrect parts to be collected. Which it was. Up to this point I was still a very happy customer, despite this snag.

What really upsets me now is that it has been near to 3 weeks since collection, and I have not had a single form of communication from anyone despite numerous emails to them. This is really unprofessional. Quick to take my money but when it's time to give after sale service they are very mediocre. It really baffles me that I have to wait 3 weeks for two parts to be REPLACED. There is no repairs to be done. Really sad.