A letter/email of complaint regarding poor service in general. In particularly it falls short of level required under the service contract - threatening termination.
1. Under the contract, [insert requirements under the contract]. However, you have not complied with this requirement.
2. In relation to [service], your service staff only do the minimum and do not meet the basic standards as required under the contract. There was a lack of attention to details.
3. Your staff was careless in performing [service] and has caused damaged to [property].
4. We are not aware of your staff performing [service] as required under the contract.
5. We can name more than [number] of services that are not done to a quality that would meet the contract requirements and to our satisfaction.