Jersey Telecoms has been fined £40,000 for setting its wholesale prices too high so other telecoms companies could not compete on price.
Markets regulator CICRA said JT was warned about the breach - but did not deal with it quickly enough.
The Jersey Competition Regulatory Authority (JCRA) says over a 13-month period, which ended in February 2020, JT priced its wholesale services to other telecoms providers at a level which restricted companies abilities to compete with JT, therefore "limiting consumer choice and value".
The JCRA says "JT did not deal with the issue in a timely and effective way even after the JCRA made JT aware of it".
JT says it is "disappointment" with the decision but "accepts" the JCRA’s conclusion.