Push Back on a Mid-Contract Price Rise in One Firm Paragraph

An email arrives announcing your monthly price is going up, mid-contract, effective next month. You are fairly sure that is not what you agreed to. This drafts the reply: short, polite, and pointed, asking them to honour the agreed price or release you without penalty. No ranting required.

Write a firm, polite reply to {COMPANY} disputing a mid-contract price rise on my {SERVICE} account. The agreed price was {AGREED_PRICE} a month and they have announced a rise to {NEW_PRICE} from [date]. The reply should be one paragraph: state that I am within my minimum term at the agreed price, ask them to either honour that price for the remainder of the term or confirm in writing that I can exit without penalty, and request a response within 14 days. Reference [any clause or wording from their announcement about the right to cancel] if I have provided it. Tone: composed and factual. Do not threaten, do not mention regulators, and do not pad it with pleasantries beyond one opening line.