Poor service and NO response

If ones pool is green a day after its weekly maintenance service then something is wrong! Sent pictures to company and asked to please sort it out by the weekend as I have a kiddie party on the Saturday and a green pool! NO response 24 hours later. But I get billed for all these tablets etc and quite honestly don't even know what gets used and what doesn't. They removed my light cover and eh now missing after complaining was assured it would be replaced and true as bob still no cover a year later. Husband works abroad hence we have the service as I don't have a clue but seems they know less than me as maintenance it is not.