I got an entry refusal but I would like to know if it is an entry ban.
The letter states:
You have sought leave to enter the UK as a visitor.
However you have admitted that during your previous visit to the UK between 15 September 2016 and 5 March 2017, you took employment as an au-pair for a family who are friends of your family. < snip of payment details > You did not tell this me when I first spoke to you and only admitted it when my colleague found your contract of employment in your bag.
You state that your parents have been supporting you by sending you approximately < snip of payment details > but you have not been able to show any evidence of this support. You do not have a ticket to return to Mexico. You state you will purchase one. You state < personal funding details >. Again you have not been able to show any evidence of these funds.
You insist that you will not take employment on this occasion. However, given your previous disregard for the immigration rules, I am not satisfied that you will not seek to do the same this time.
I am not satified that you are a genuine visitor as required by paragraph V 4.2 of Appendix V: Immigration Rules for Visitors. You are therefore refused entry to the UK.
You have not sought entry under any other provisions under the immigration rules.
I therefore refuse you leave to enter the United Kingdom.