Does ESA, PIP not make me eligible for Housing Ben

Hi there
Could you please help me with my urgent matter.
i suddenly received letters 1 for ESA review for which i have followed the guidelines on this website to submit the ESA50 form.
2, that my housing benefit had stopped because i am on ESA, i have a child of 4 years old whose mother was receiving tax credit and childcare for which these childcare are used directly for the chidcare costs. i do not received this directly but the mother of my son does.
in the latest letter i received yesterday, i then received a new worked out calculations which includes the childcare paid to childcare provider, and stated that hence my income is high and no longer entitled to housing benefit. i am still awaiting decision from ESA. i have both physical and metal disabilities. i have provided all proofs. The help i needed from you is to find out if i am told that i am not entitled to housing benefit any longer, is this a correct decision? despite having the mental impairment form for the council tax exemption in place, and i am expected to pay back £8987.00 around £9,000.00 from may last year because i had a partner living with me.
my question is am i not entitled to housing benefit, ESA, PIP because i have someone living with me who gets the childcare/tax credit that are paid directly to the childcare providers?
Please help!!! for this matter has caused me a lot of mental distress , physical bodily pain and a set back in recovering from my depression. it is a hard struggle getting around writing this message. Please advice its all muddled up? many thanks