"This financial channel they recently set up resembles a joke, a bitter joke," Khamenei told a thousands-strong congregation in a televised address at a shrine in the northeastern city of Mashhad, where he speaks every year to mark the Iranian New Year.

Britain, France and Germany launched the special payment system called INSTEX -- Instrument in Support of Trade Exchanges -- in late January after President Donald Trump abruptly quit the 2015 nuclear deal between Iran and world powers in May last year.

The three countries were the European signatories to the deal, also signed by the US, Russia and China, that curbed Tehran's nuclear ambitions in return for sanctions relief.

London, Paris and Berlin launched the device in the hope it will help save the deal by allowing Tehran to keep trading with European companies despite Washington reimposing sanctions.

"The difference between what they are obligated to do and what they are proposing is as far as the earth is from the sky," Khamenei said.

"We should completely forego (any hope) of help or cooperation from Westerners in strengthening our economy, we shouldn't wait for them," he said.

"Once again the Europeans have stabbed us in the back, they have betrayed us," Khamenei said, cursing Western politicians as "savages".

"They wear suits, they put on ties and eau de cologne and carry Samsonite briefcases but they are savages," Khamenei said.

"What I am saying does not mean (Iran) should cut Western ties, not at all... there is no problem in having relations with them, but trusting them is a mistake, don't trust them," he said.

Iran on Tuesday registered a parallel structure to INSTEX called the Special Trade and Finance Institute or STFI, the semi-official ISNA news agency reported.

"With the registration of STFI, we expect that, in cooperation with INSTEX, it would facilitate trade between Iran and Europe and be influential in countering limitations caused by US sanctions," said Iran's central bank governor Abdolnaser Hemmati.

Earlier on Thursday, Khamenei called the economic difficulties of Iranians the most urgent problem facing the country.

"Specially in recent months the difficulties for people's livelihoods have increased," Khamenei said in a prerecorded message to mark the March 21 start of the New Year.

"The economy is the country's urgent problem, it's the country's (most) serious and primary problem," he said, pointing to the rial's devaluation, decline in purchasing power and falling production.

kas/mj/hc

SAMSONITE INTERNATIONAL